enhancement to GitHub Action testing for DB

[huss]

In reference to the new setup for GitHub Actions, @campionfellin said: One nice benefit to a lot of these now is instead of having them in plaintext in the .travis.yml file, they can be put into the Github secrets section and then inserted like ${{ secrets.OED_DB_TEST_USER }}.

Then perhaps down the road a test postgres db can be set up permanently that all the tests connect to.

[huss]

These tests are run from .github/workflows/build.yml.

[corygreer18]

Niccm (Nick Mederos) and I worked on documentation and next steps for this issue that can be found in the below file. enhancingGitHubAction.md