Finds the real alias for the entity + objectalias combination. A real alias is necessary as an entity mapped onto multiple tables (through inheritance) is aliased with a single object alias but each target has to have a different real alias. Checks all scopes.

Finds the real alias for the entity + objectalias combination. A real alias is necessary as an entity mapped onto multiple tables (through inheritance) is aliased with a single object alias but each target has to have a different real alias.