* Use correct username for MySQL on Travis
  Travis docs say username should be 'travis', not 'root'.

* Fail test_migrations.sh if any command fails
  Previously, a failing (non-zero exit code) command would not lead to
  a non-zero exit code of test_migrations.sh. That meant that failing
  migrations would not fail the Travis job as intended.

* Remove accidentally commmitted module code
* Adjust gitignore files
* Add MakeFile target for pulling down puppet modules
* Add settings file for MySQL/Postgres