Fix EZP-22174: Respect site.ini\[RoleSettings]\EnableCaching setting in eZUser::purgeUserCacheByUserId() and eZUser::getUserCacheByUserId()
Merge pull request #860 from guillaumelecerf/respect_RoleSettings_EnableCaching

Fix EZP-22174: Respect site.ini\[RoleSettings]\EnableCaching setting in eZUser::purgeUs...