In the process of fixing

        4428658:
        Wrong RepositoryId generation from some of the
        Portable Interceptors IDL files

I found that some of the CSIv2 files would pass IDL compilation but
fail when the generated source was being compiled. I spent hours
trying to figure it out. I finally thought it was a compiler bug.
But just now I stumbled on the reason.

The Interceptors.idl file contains some definitions for module IOP.
I'm not sure why this is the case now. Last fall, the parts of other
modules (i.e., Messaging, IOP) which interceptors referenced where
moved into their own idl files IOP.idl and Messaging.idl respectively.
For some reason, parts of IOP are still in Interceptors.idl.

This is what is causing the CSIv2 generated files not to compile,
since they do not see the definitions and end up emitting IOP.foo and
instead of org.omg.IOP.foo.