LPS-45491

Model listeners are already handled by the contains check in TableMapperImpl, see https://github.com/liferay/liferay-portal/blob/master/portal-service/src/com/liferay/portal/service/persistence/impl/TableMapperImpl.java#L103-L105, which applies to 6.2.x and master. We already have a contains check as well in the auto-generated inner classes in 6.1.x, see https://github.com/liferay/liferay-portal/blob/6.1.x/portal-impl/src/com/liferay/portal/service/persistence/GroupPersistenceImpl.java#L6889