Update config and job persistence unit tests to run migrations

[tuliren]

Current Behavior

After introducing Flyway migration, any unit test that depends on the database need to run the migrations first. Currently most such unit tests do not do this. It is not a problem now because there is no Flyway migration yet. But we will run into this problem soon.

Expected Behavior

Unit test should work after Flyway migrations are introduced in the future.

Are you willing to submit a PR?

Yes.

[tuliren]

This issue has been resolved in #7219. Use TestDatabaseProviders to create databases in unit test. It will take care of the initialization and migration.