Error handling for workspace users/groups list.
Merge branch 'master' of https://github.com/claroline/CoreBundle into bugfix

Conflicts:
	Resources/translations/platform.en.yml
	Resources/translations/platform.fr.yml
Role suppression confirm message + analytics ergonomy.
spanish translation
Remove useless code.
Merge pull request #740 from ngodfraind/bugfix

Error handling for workspace users/groups list.