CORBA23 — set_servant_manager

Summary: What exception should POA::set_servant_manager raise if the wrong servant
manager type is passed? For example, if a POA has RETAIN and I try to
register a ServantLocator, should set_servant_manager raise WrongPolicy, or
some system exception? With respect to set_servant_manager, the spec says

"This method requires the USE_SERVANT_MANAGER policy; if not present, the
WrongPolicy exception is raised."

Because WrongPolicy is used to denote whether set_servant_manager can be
called correctly or not, it seems like the wrong exception to also use for
the case of passing the wrong servant manager type. May I suggest that
BAD_PARAM be raised in that case instead?

Incorporate change in 2.4 and close issue.