Fixed .gitmodule for Ansible deployments

Currently, Ansible always set the --remote got git submodule update operations.
Since no branch is specified for the submodule, it defaults to origin/master which gives an error (there is no master branch in [elFinder](https://github.com/laclasse-com/elFinder).

This patch adds a branch name for the submodule, so deploys can run fine. A request has been sent to the ansible ML to confirm this is an issue on the ansible side.
Indent fix

Ok, the github online editor is not indetation friendly...
C'est n'importe quoi l'éditeur de GH !

Ok, fait en local avec vim...
Tss... cmon guys, translate tabs to spaces !

Rule 1 : tabs must ALWAYS be converted to SPACES !
Merge branch 'hotfix/db_migrate'
Merge branch 'master' of github.com:laclasse-com/service-documents
Merge branch 'release/1.1Beta6'
refactoring des documents publics
Ajout des test pour le refactoring des documents publics
Merge branch 'feature/upgrade_public_docs' into develop
Merge branch 'release/1.0.0'
ajout d'une constante dans le sample qui manquait
Merge branch 'hotfix/options_sample'
Merge branch 'hotfix/options_sample' into develop
correction de l'url pour ouvrir un share grace à son id_ent
Merge branch 'hotfix/url_share' into develop
Merge branch 'develop' of github.com:laclasse-com/service-documents into develop