erp5_corporate_identity: add missing files, update compare files, set all dates to arbitrary values in test

For type checking (not recommended, but sometimes useful).
Expose it as BaseQuery, to avoid conflict with AutoQuery original name.

Make it more easily extensible by exposing a callback.
Stop loading documents in the simple version that are only needed by the
detailed version. Also, stop checking for this inside the main loop, and
instead use the callback mechanism.
Use a single query to look for mirror section title instead of one per
mirror section.
Behaviour change: mirror section (ie, the entity) title is not
translated anymore. It used to be because there did not seem to be a
reasion not to. It is not anymore to avoid loading rach entity from ZODB
in the default report. This rework makes customisation easier, including
overwriting this untranslated title with any desired transformation.

- ERP5Site_getScalabilityTestMetric script gets metrics of last created objects
- Bootstrap script now creates the users for test

/reviewed-on nexedi/erp5!513

This contains changes for 2 points:
1. To improve view of ERP5 Catalog and its sub-objects .
2. Export Catalog Methods with no duplication between attributes and properties after migration.

These changes are pointed out  in comment here: nexedi/erp5!178 (comment 52224)

/reviewed-on nexedi/erp5!510

BusinessTemplate: Look for string type in property map while extracting Properties for CatalogTemplateMethodItem

After migration of ERP5 Catalog and sub-objects, the filter attributes are
now properties of Catalog Method(s). So, they are now already exported in
xml file for the method. Thus, no need to duplicate export in _catalog_keys file.

Also, installation should take care of the changes.

Also, add tests for them