Methods whether classId is valid or not . Given class is case insensitive.

def FindClassIdInMoMetaIgnoreCase(classId):
		""" Methods whether classId is valid or not . Given class is case insensitive. """
		if not classId:
			return None
		if classId in _ManagedObjectMeta:
			return classId
		lClassId = classId.lower()
		for key in _ManagedObjectMeta.keys():
			if (key.lower() == lClassId):
				return key
		return None