Problem: Invoking CHECK TABLE ... FOR UPGRADE on temporary tables would
trigger assert. Root cause was that the temporary table was not located
in the DD.

Solution: Avoid calling check_for_upgrade (which looks up the table in
the DD) for temporary tables, and just report status as OK directly.

Change-Id: If3464af7df0e6895c9fb9dfa8a53e29ff621f67e