Adding a new UserEntity which maps to the correct table for user info
 - Table name: CRU_CRS_USERS
IdentityService will now use the new UserEntity instead of IdentityEntity to store user information.
 - AbstractAuthManager also knows of this new relationship
Remove IdentityEntity.  The table it maps to is also going away.
Update database build scripts:
 - Remove table cru_crs_identities
 - Registrations which don't map to known users are no longer included
 - Answers which belonged to above registrations also are no longer included
 - crs.testuser@crue.org is added into the test database
 - populate_crs_db script is updated to no longer reference cru_crs_identities file
Adding more mock conference data
Merge pull request #21 from CruGlobal/fix-user-storage

Fix user storage