final tests

the last one "hotBackupWorks" is inactive - it is ready but I think it
wouldn;t run unless there will be another thread

all my tests are finished!!!

I didn't look on the ex3 in order to do it - although I expect kind of
match (more or less)

maybe I will do more tests - when I would have time :)

ohh - and I added a little method in VotingList class

all the test that I implemented  had passed - the only ones which didn't
are the two I didn't implement