updated radacct in the test.sql mysql dump
Added 3 more unit tests:

1)test_DissasociateQuery -- This unit test makes sure that the query in dissasociate does what it is meant to.
	*more specifically it tests that the correct amount of mac addresses are returned and that there values are correct.
2)test_Cull -- This unit test makes sure that cull manipulates the database correctly.
	*it tests that the correct values are removed and that values that shouldn't be removed aren't
3)test_UpdateRadcheck -- This unit test makes sure that the updateRadcheck function manipulates the DB correctly.
	*it tests that all of the old entries get a new db entrie where value='Reject'

I also added a bunch of comments.