And, Handle exception cases for already validated catalog

multiple_catalog: handle exception while unindexing objects when we don't have validation_state defined on catalog

Migrating current portal_catalog to erp5 object.    

# Major changes :  

- We have new classes for various objects based on base classes which we use for ERP5 objects.  

| Old class | New class | Parent Class  | Portal Type |
| ------------ | ------------- | ----------------- | ----------------|
| CatalogTool | ERP5CatalogTool | BaseTool | Catalog Tool |
| SQLCatalog | Catalog | ERP5Type.Folder | Catalog |
| ZSQLMethod | SQLMethod | XMLObject | SQL method |

- All the major attributes for these objects has been changed to properties. For these, we have some property_sheets added.  
  - **Catalog** : Properties like sql_clear_catalog, sql_search_result_keys, etc
  - **CatalogTool** : Properties like default_erp5_catalog_id, archive_path, etc
  - **SQLMethod** : Properties like arguments, templates, etc
  - **CatalogFilter** :  For CatalogMethod objects, we have added filter properties which earlier used to be an attribute of SQLCatalog saving object in PersistentMapping.   

# Installation :  
- **New ERP5 Instance** : For a new ERP5 instance, you get installed ERP5 Catalog Tool and ERP5 Catalog by default. Concerning sub-objects and python scripts, we have added an extra step in installation of `CatalogMethodTemplateItem` (mentioned in next section). This part is conversion of catalog methods to ERP5 objects.
This adds little extra time to installation of BT5 containing catalog methods.
- **Running ERP5 Instance**:  We migrate the objects(`portal_catalog` as well as its sub objects) dynamically to the new portal_types, thanks to usage of `__of__` and `__bootstrap`.  Concerning dynamic migration,  it is handled via `synchronizeDynamicModule` function, which cover all steps in a transaction, hence any error in between rolls back the changes.

# Migration Steps for running instance :  
1. Rebase your erp5 repository on new code.
2. Restart `zope` process.
3. Wait for activities to finish. Thereafter you can check from `portal_catalog/manage_main` that we have catalog and sub-objects as ERP5 objects.
But you still won't be able to see the `view` for those objects, so we move to next step of upgrading Business Templates. *It is normal to get error that catalog view is unaccessible*. You can check if you get this error both for `portal_catalog` as well as `erp5_mysql_innodb` also.
4. Restart `zope` process **again**.
5. Update `genbt5list`.
6. In template tool, upgrade business templates and upgrade `erp5_core` Business Templates. Wait for activities to finish(may take some time, 1-2 mins). After that, you are good to go and use ERP5 Catalog.

**Changes in bt5 installation for CatalogMethodTemplateItem**  
- When we don't have default catalog installaed :   
*Use case: Installation of BT5 during  ERP5 setup*  
In this case, while installation of `erp5_mysql_innodb_catalog`, we create the catalog and install all CatalogMethodTemplateItem there. Also, in the mean process, we convert the zsql methods and script(python) to erp5 objects. This process is only carried once, i.e at the installation of catalog. This is done in `ObjectTemplateItem.install` function
- When we have `ERP5 Catalog` installed :  
*Use case: Installing BT5 containing ZSQL Method while we have ERP5 Catalog installed*  
We use `install` function for `Class CatalogMethodTemplateItem` in this case. Here, we check for `aq_parent` of the catalog method and if it is an 'ERP5 Catalog', we convert it to erp5 objects.

# Performance :   
- Adding extra step in BT5 installation adds some extra time to performance.
- Because, in every erp5 objects, object lookup is done via `_getOb` rather than `__getattr__`, so this adds a bit in improving performance.
- Overall, we lose around 2~3% performance.

# Problem pertaining/Limitations :  
- Need to restart erp5_site before upgrading BT5(s) -  Current structure of migration uses `__of__` function to migrate catalog which in turn makes a call to generation of dynamic classes for catalog object. This is where it calls `_importClass` method, which ends up calling `setDefaultClassProperties` function on multiple layer of classes including `ERP5Site`. Thus, we end up having `isRADContent` for portal object which comes as a hindrance when we try to index objects in acquisition such as `portal_skins`, etc.

# Extra points to be noted :  
- `Catalog` object shouldn't be indexable(because of the problem which may arise due to circular dependency).
- Dynamic migration keeps all the old attributes for now, so as not to lose any user made change. 

# Concerning Links :  
- Documentation WebPage                   :  https://www.erp5.com/erp5-Migrating.erp5.catalog  
- Test Suite                                                    :  https://nexedi.erp5.net/test_suite_module/284   
- Latest Test Result                                    :  https://nexedi.erp5.net/test_result_module/20171120-61F85D0C
- Latest Performance Result                  :  https://nexedi.erp5.net/test_result_module/20171120-2615A7B


/reviewed-on nexedi/erp5!178

And, Patch changeObjectClass extension to remove useless attributes

Copying __dict__ from one object to another brings us to situation where
we don't have many objects which we don't need at all, for example, migrating
objects with subclasses who were initially OFS objects and later an ERP5
object can lead to adding subobjects as attributes of the new object, which
is completely undesirable. To handle this, it is important to delete the
sub-objects as the attributes for those migrated classes.

Old Catalog Tool didn't have portal_type attribute, so while migrating
via synchronizeDynamicModule, after _bootstrap, we expect the tool to
have a portal_type to finalize migration.

This step is now being done only at the end of _bootstrap after we
change the classes for portal_catalog and its sub-objects.

Also, add condition to display the view only when the container is 'ERP5 Catalog'

- This step is needed due to the use of BaseTool as Base class for CatalogTool
  due to which there were conflict between reindexObject from the Base and the one
  from the BaseTool.

ERP5CatalogTool class inherits from BaseTool.

Significant addition/changes in:
-------------------------------
  ERP5CatalogTool:
    Add functions _isBootstrapRequired and _bootstrap
    Explicilty add manage option tabs in Catalog Tool

  BusinessTemplate:
    Update BusinessTemplate installation according to changes made in ERP5Catalog and Tool

  testCopySupport:
    Its better to change the tests where they need to call getpath function of
    portal_catalog to use portal_catalog.getpath instead of portal_catalog.getPath,
    as we have overridden the 'getPath' function for CatalogTool class due to change
    in inheritence.

  ERP5Site:
    Create portal_catalog while setting up erp5site

Move from SQLCatalog to ERP5Catalog as the default Catalog inside ERP5.
The major difference is use of Products.ERP5Type.Core.Folder as Catalog
base class.

Significant addition/changes in
-------------------------------

  ERP5Catalog class:
    Inherit from Catalog class from Products.ZSQLCatalog.SQLCatalog instead of copy-pasting the whole code again.
    Monkey patch some property setters and getters to maintain consistency
    Override getCatalogMethodIds cause it uses global variable in SQLCatalog.Catalog
    Add FilterDict and Filter class to have consistency with `filter_dict` attribute of SQLCatalog

  BusinessTemplate:
    Update BusinessTemplate installation with updated filter_dict
    Also, use dynamic migration while installing the catalog method objects for
    bt5. This way we have SQL Methods migrated just after installation.

  Tests:
    Update tests according to changes in portal_catalog

  SQLCatalog, testZSQLCatalog:
    Cleanup for unusable functions

Create the SQLMethod class based on ZSQLMethods.SQL
class and XMLObject.

Clean up the macros and add description to make them more readable.
Precise where the filter/sort editors are located.
Add macros to manage the filter panel.

Its bad to access file from filesystem.

Just a typo probably