Group Owner Delete
Removes an owner from a group.
Signature: def groupownerdelete(cinfo)
Parameters:
cinfo['groupid'] - The group the owner should be removed from
cinfo['owner'] - The user that should be removed as an owner
Return Value:
ACSuccess 0
ACUnknownError 1
ACOperationNotSupported 2
ACInvalidUser 7
ACInvalidObject 38
ACNotRelated 40