Fixe two files with the same name in team storage.

[corentindrouet]

Fixes #434

Plaza now do the same trick than when a file is uploaded: checking if the name is already used, when moving the file in another folder. To valid this fixes, rebuild plaza, and set config like this: teamStorageAddress: 'localhost' teamStoragePort:9091 Steps to reproduce:

• Enable teams.
• Create a team.
• Upload a file and create a directory.
• Move your file in the directory.
• upload your file again, then move it in the directory too.

Expected result:

• The second file should have a "(1)" added to his name.

[coveralls]

Coverage remained the same at 70.67% when pulling fb95196b0e2e9d77a954f6b786951d7651a12229 on corentindrouet:fix_plaza into cf8434ee046206314fe1daaa3b58e913b4a63fa2 on Nanocloud:master.