Avoid having to list all the possible object types twice. Instead, only _getObjectDescription() needs to know about specific object types. It communicates back to _printTocEntry() whether an owner is to be set.
In passing, remove the logic to use ALTER TABLE to set the owner of views and sequences. This is no longer necessary. Furthermore, if pg_dump doesn't recognize the object type, this is now a fatal error, not a warning.
Makes sense, passes all tests.
It's clearly out of scope for this very focused patch, but would it make sense for the TocEntry struct to be populated with an type enumeration integer as well as the type string to make for clearer and faster sifting later?
