Expand test a bit
Make pg_constraint output in inherit test show the convalidated column
as well. This shows the interaction between convalidated and
conenforced.
This is extracted from a larger patch so that this reformatting isn't
distracting there.
Author: Amul Sul <amul.sul@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/CAAJ_b962c5AcYW9KUt_R_ER5qs3fUGbe4az-SP-vuwPS-w-AGA@mail.gmail.com