Update tests/unit/returners/test_postgres_local_cache.py
Update tests/unit/returners/test_postgres_local_cache.py

Committing requested changes.

Co-authored-by: Pedro Algarvio <4410d99cefe57ec2c2cdbd3f1d5cf862bb4fb6f8@algarvio.me>
saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt