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
Delete block associated answers - Initial baseline
Delete answers from block service
Add block answers deletion to page service
Other refactoring
Only delete page associated blocks answers in update page service on single page update client request
Add delete page block answers to conference service update
add support for block equality check
add conference costs to conference entity when converting from conference
Minor refactoring
add collections util test
Fix ConferenceServiceTest update conference delete block from page
Use conference id as conference costs id.
Fix delete block with answer(s) ConferenceServiceTest
Merge branch 'delete-block-answers' of https://github.com/CruGlobal/conf-registration-api into delete-block-answers