[ldapfeed] Add support for LDAP groups (closes #2528116)
Groups from the LDAP server are imported as CWGourp entities, and in_group relationships are created between existing CWUsers and CWGroups
Unit tests have been refactored a bit, especially ti add helper methods to manage LDAP database.
\.svn
^build$
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\~$
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^doc/book/en/apidoc$
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.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/