Remove old 'cru_crs_' prefixed drops from these files.
Merge pull request #49 from CruGlobal/cleanup-db-scripts

Remove old 'cru_crs_' prefixed drops from these files.
`CrsLoginServlet` was replaced long ago by a JAX-RS endpoint.  This class can be deleted.
Add a couple basic level unit tests for better coverage.
Merge branch 'master' of http://github.com/CruGlobal/conf-registration-api
Merge branch 'master' into conference-details