Blindly attempt to fix sepgsql tests #2.

contrib/sepgsql/expected/alter.out

@@ -173,9 +173,9 @@ LOG:  SELinux: allowed { select } scontext=unconfined_u:unconfined_r:sepgsql_reg
 LOG:  SELinux: allowed { execute } scontext=unconfined_u:unconfined_r:sepgsql_regtest_superuser_t:s0 tcontext=system_u:object_r:sepgsql_proc_exec_t:s0 tclass=db_procedure name="pg_catalog.int4eq(integer,integer)"
 ALTER TABLE regtest_table ADD CONSTRAINT test_ck CHECK (b like '%abc%') NOT VALID;      -- not supported
 ALTER TABLE regtest_table VALIDATE CONSTRAINT test_ck;  -- not supported
-ALTER TABLE regtest_table DROP CONSTRAINT test_ck;      -- not supported
 LOG:  SELinux: allowed { execute } scontext=unconfined_u:unconfined_r:sepgsql_regtest_superuser_t:s0 tcontext=system_u:object_r:sepgsql_proc_exec_t:s0 tclass=db_procedure name="pg_catalog.textlike(pg_catalog.text,pg_catalog.text)"
 LOG:  SELinux: allowed { execute } scontext=unconfined_u:unconfined_r:sepgsql_regtest_superuser_t:s0 tcontext=system_u:object_r:sepgsql_proc_exec_t:s0 tclass=db_procedure name="pg_catalog.textlike(pg_catalog.text,pg_catalog.text)"
+ALTER TABLE regtest_table DROP CONSTRAINT test_ck;      -- not supported
 CREATE TRIGGER regtest_test_trig BEFORE UPDATE ON regtest_table
     FOR EACH ROW EXECUTE PROCEDURE suppress_redundant_updates_trigger();
 ALTER TABLE regtest_table DISABLE TRIGGER regtest_test_trig;    -- not supported