Added tests for workspace tag repositories
Merge branch 'refactoring-repositories-test' of https://github.com/claroline/Claroline into refactoring-repositories-test
Refactored database write action in WorkspaceTagController
Refactored WorkspaceTag manager and writer
Refactored double quote to simple quote
Merge pull request #43 from claroline/refactoring-repositories-test

Refactoring repositories test