EZP-21312: Added Content/ObjectStates href to REST response
EZP-21312: Added /ObjectStateGroup/ObjectStates href to REST response
EZP-21930: Updated REST Root.xsd
EZP-21312: Added /Location/UrlAliases to REST Location
EZP-21312: Added ContentType draft & groups to rest response
EZP-21312: Added user groups to rest response