fix the config option to remove the ability for users to set their displayname
Replace static usage of OC_Config and OC_Preferences with the injected \OC\ConfigAll
Pass config object in testGetHomeNotSupported
[tx-robot] updated from transifex
Return SPACE_UNKNOWN if disk_free_space is disabled when getting the free space on a local storage
Make OC_Avatar unit tests independent of currently loggedin user