CORBA3 — Inconsitent exception handling with find_POA & unknown_adapter

I think we totally messed up the resolution to issue 3740. We added the
following text (circa CORBA 2.5) to 11.3.3.2:

"If unknown_adapter returns FALSE then find_POA raises
AdapterNonExistent. If
unknow_adapter raises any system exception then find_POA passes through
the
system exception it gets back from unknown_adapter."

[ There is also a typo in this text: "unkown_adapter".]

and this text to 11.3.8.3:

"If find_POA receives a system exception in response to a call to
unknown_adapter
on a POA, find_POA raises OBJ_ADAPTER system exception with standard
minor
code 1."

In the former, system exceptions raised by unknown_adapter are to be
passed through unchanged by find_POA. In the latter, system exceptions
raised by unknown_adapter are to be replaced with OBJ_ADAPTER(1).

I think the former behavior is more correct, since it preserves the
original exception and doesn't throw away useful debugging information.

The former (i.e. 11.3.3.2) is right. Change the latter to match the former