Decouple Tests From Remote Config Locations

[brianwyka]

Need to replace tests that reference remote config locations with mock server implementations to avoid flaky tests.

For example:

config-locations:
  - https://raw.githubusercontent.com/optum/sourcehawk-parent/main/.sourcehawk/config.yml

Would be replaced with:

config-locations:
  - http://localhost:8080/optum/sourcehawk-parent/main/.sourcehawk/config.yml

And a mock server would be setup during test to respond with required content...