6.7.6-7 fixes issue of darkening some images.

Directly modify the erp5 software release instead. It allows to:
 * use git to know the current difference between the standard.
 * work to drop all those differences
 * reduce installation time when developping locally

More details can be found on:
https://mail.zope.org/pipermail/zodb-dev/2010-April/013287.html

Kudos to Łukasz for noticing.

Especially, explain what is meant by "last call".

As h.r.download was anyway updated, it will result in a lot of recompilation,
so it is the best moment to upgrade buildout.

It does not destroy buildout contract, so there is no need for local downloads
directory.

This mysql init function is called by mariadb_update script before
setting up mariadb user accounts. Since sphinx was not available,
the mariadb_update script failed, then account were not set, then
test were failing since there were not allowed to access mariadb
databases

setuptools are pinned, and distribute is not used at all in ERP5 SlapOS
based installation.

Temporarily revert "version up : Zope 2.12.23." in erp5 branch whose change on ObjectManager's behaviour breaks some ERP5 tests, that should be fixed in ERP5 side anyway.

This reverts commit 529d7892.

version up : JRE 6 update 31. download from java.com, because downloading from oracle.com requires user's interaction.

* Note end-of-life timeline: Zope 2.12.x is now in security-fix-only mode and will continue to see security updates until October 2013, the same as Python 2.6.x does.
* Ensure that ObjectManager’s get and __getitem__ methods return only “items” (no attributes / methods from the class or from acquisition). Thanks to Richard Mitchell at Netsight for the report.
* Updated distributions:
  * distribute = 0.6.24
  * Products.ZSQLMethods = 2.13.4
  * zope.catalog = 3.8.2
  * zope.componentvocabulary = 1.0.1
  * zope.datetime = 3.4.1
  * zope.deprecation = 3.4.1
  * zope.documenttemplate = 3.4.3
  * zope.index = 3.6.3
  * zope.keyreference = 3.6.4
  * zope.mkzeoinstance = 3.9.5
  * zope.session = 3.9.5
  * zope.testing = 3.9.7

Define update method (aliased to install).