Fix queries that uses property Attendee.attendee by Attendee.userAccount the property attendee does not exist anymore just on hibernate mapping relation
Issue #32 : Constant Names
Issue #32 : Redudant Modifier
Merge pull request #50 from danielsoro/master

Those commits are related to the issues #6 and #23. To be tested before considering the issues closed.
Merge pull request #51 from georgemayko/master

Refactoring Queries on Attendee by change of the property of attendee to userAccount and fixing some Sonar violations Issue #32.
Fixed #20: Added authorship to the file and improvements on the design.