UNCLASSIFIED - NO CUI

added ./tests/images.txt for postgres12 image

Christian Bakerrequested to merge
cb/added-postgresql12-image into main

General MR

Summary

Adds ./tests/images.txt for postgres12 image

Relevant logs/screenshots

N/A

Linked Issue

issue

Upgrade Notices

N/A

Merge request reports

UNCLASSIFIED - NO CUI