Merge branch 'master' into Issue2420
if persistence course parameter is available, registration status is not checked
added/fixed test cases for instructor home page
added test cases to student home page to cover persistence check branch
fixed all test cases
Merge branch 'master' into Issue2420
1. get data from Students for student counting
2. add unique instructor email counting
Changed feedbackSubmission task queue configuration
Add comment for task queue change
Merge branch 'master' into Issue2420
added code to handle compatibility issues with IE8 for window.addEventListener
1. remove accounts database reading
2. reduce database reading for students and instructors
fixed instructor comments page UI test
Merge branch 'master' into Issue2527
[2527] Make feedbackSubmissionAdjustment task queue run sequentially
Merge branch 'master' into Issue2420
[2420] NPE during authentication
Merge branch 'master' into Issue2509
[2521]StatisticsPerInstitute: use students instead of accounts

fixes #2521
fixed minor bug and removed console logging