Requires:
~~~~~~~~~
-
New features:
~~~~~~~~~~~~~
- LDAPBackingDirectory: added explicit filter for LDAP entries.
Bug fixes:
~~~~~~~~~~
- BaseDirectory: listEntryIdsAndTitles returned a list of tuples (id, id)
  instead of (id, title)
- IndirectDirectory: listEntryIdsAndTitles and
  listAllPossibleEntriesIdsAndTitles returned a list of tuples (id, id) instead
  of (id, title)
New internal features:
~~~~~~~~~~~~~~~~~~~~~~
- ZMI search uses unrestricted search method.
- BaseDirectory has unrestricted _editEntry and _creatEntry methods,
  used by meta and stacking directories.
  Access control is done by the primary directory, not by each backing.
- API for search factoured out in BaseDirectory adding method _getSearchFields
- Test case does not depend anymore on CPSTestCase.
- Fixed LDAP testing framework.
