updated composer.json for 2.1
updated composer.json for 2.1

Soullivaneuh/DoctrineBundle,hason/DoctrineBundle,hacfi/DoctrineBundle,gencer/DoctrineBundle,fabpot/DoctrineBundle,dunglas/DoctrineBundle,mikeSimonson/DoctrineBundle,doctrine/DoctrineBundle,hason/DoctrineBundle,gencer/DoctrineBundle,nicolas-grekas/DoctrineBundle,mikeSimonson/DoctrineBundle,OskarStark/DoctrineBundle,fabpot/DoctrineBundle,fervo/DoctrineBundle,lafourchette/DoctrineBundle,chrisguitarguy/DoctrineBundle,OskarStark/DoctrineBundle,javiereguiluz/DoctrineBundle,javiereguiluz/DoctrineBundle,hacfi/DoctrineBundle,Soullivaneuh/DoctrineBundle,stof/DoctrineBundle,fervo/DoctrineBundle,nicolas-grekas/DoctrineBundle,chrisguitarguy/DoctrineBundle,skafandri/DoctrineBundle,skafandri/DoctrineBundle