Give to RelDb a DataSource, rather than server address, port, etc.
Make test suite work, now when RelDb gets a DataSource

- Add dependency on BoneCP, http://jolbox.com/
- Change my old "test.debiki.pgsql.*" config values to Play's
  "db.test.*".
- Softlink ./src/test/resources/local to the grandparent Git repo,
  supposedly a debiki-site-seed clone.
- Load any test-db.conf file from that repo, from:
  <debiki-site-seed>/conf-local/test-db.conf
Check for Approval.Temporary.
Don't check for Approval.Temporary; it's gone.