Add FeedbackResponsesDbTest
Add missing assumption in FeedbackResponsesDb
Add helper functions in TestHelper
Change "assertEquals(null,... " to assertNull(..." in TestHelper
Fix typo
Add testGetFeedbackResponsesForQuestion
Add testGetFeedbackResponsesForSession
Add testGetFeedbackResponsesForReceiverForQuestion
Add testGetFeedbackResponseForReceiverForCourse
Add testGetFeedbackResponsesFromGiverForQuestion
Add testGetFeedbackResponsesFromGiverForCourse
Add testUpdateFeedbackResponse
Add test to testing.xml
Merge branch 'master' into Issue1970
[1970] Clean up FeedbackResponsesDbTest

fixes #1970