Fix TestAverageUserCantViewReturnsHttpUnauthorized
Fix issue where calculating the average rating when there are no ratings would return an exception
Fix test for unique constraint when creating a batch rating
Remove SummaryText from BatchRating because it isn't used
Fix TestCanRetrieveAssociatedBatch and remove tests for SummaryText
Fix TextCanTetrieveAssociatedUser
Fix TestCreateBatchRating
Fix TestGetPreviousRatingWillReturn403Error
Fix TestIndexUserCantViewReturnsHttpUnauthorized
Fix TestPostPreviousRatingWillReturn403Error
Fix TestRatingCanHaveComment
Fix TestRatingCanHaveNullComment
Fix TestUserCanHaveMultipleRatings
Fixes issue with TestUtils recreating the DbContext, but causes many other errors that were not apperent before the change because of foreign key violations.