Added the DecisionService with the findWinners method.
Removed unecessary fields.
Added a verification for the list of winners.
Changed the output for the multiple winners use case.
Added two methods to the vote service.
Replaced the call to method exists to a verification of the id found with findByName
Added the call to switchStatus for the multiple winners and the single winner use case.
Refactored the hard coded 1 value into the testSubjectId variable.
Added a verification before switching the status.
Replaced the voteDAO.exists method with a verification from the findByName method.
Changed the output if the subject already exists.