Now projects are exported in ProjectName/Repo format to Gerrit
fix tests
Merge branch '2421_spike_gerrit_replication' into 2505_replicate_tuleap_groups_gerrit
first step to gsql for groups management
now add member to a given gerrit group
now remove user from gerrit group
now using git repo instead of group_name
adding hooks, first step of membershipManager
MembershipManager can now add a user to corresponding groups
some refactoring…
now can remove a user from a group
refactoring (moving gerrit_groups from projectCreator to MembershipManager)
adding dedicated method to retrieve gerrits groups full names
introducing pattern Commander
 adapting gitPlugin
debugging, should work now

* fix some require onces
* fix the way Ugroups are given to the PermissionManager
* fix gsql query (not escaped space)
singletonitus test
fixing test
Merge remote-tracking branch 'stable/master' into 2505_replicate_tuleap_groups_gerrit

Conflicts:
	tools/continuous_integration/singletons/current_singleton_count.txt
Git tests runs in temporary directory (fix php53 tests)