Fix registrantType not being removed from conference object
- create test
- correct name of table in RegistrantTypeService
Merge pull request #230 from CruGlobal/EVENT-55

Remove registrantType from conference Object
Merge branch 'EVENT-24' into EVENT-57
Return answers with registrant object
- add answers to each Registrant in RetrieveRegistrationProcess
- Send a Registrant in place of RegistrantEntity to Registration.fromDB
Return Answers with registration
- move answer / registrant matching to Registration