pgsql: Tidy up Object Access hooks tests

Tidy up Object Access hooks tests

per gripelet from Tom Lane.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/a3b071bbe050252b35c589a7f1a2ee2f7ee3e9d4

Modified Files
--------------
src/test/modules/test_oat_hooks/Makefile                    | 5 +----
src/test/modules/test_oat_hooks/expected/test_oat_hooks.out | 2 +-
src/test/modules/test_oat_hooks/sql/test_oat_hooks.sql      | 2 +-
src/test/modules/test_oat_hooks/test_oat_hooks.c            | 5 +++++
4 files changed, 8 insertions(+), 6 deletions(-)