Multi user features :

->Use Usr App related fonctions instead of Global App related Functions

Change-Id: I85dc3729d79dd35eeea77216b3f199266a896a29
Signed-off-by: Sabera Djelti (sdi2) <sabera.djelti@open.eurogiciel.org>
Merge pull request #367 from eurogiciel-oss/multi-user

Multi user features :