Merge branch 'dev'
Changed assumption of InstructorCourseStudentDetailsEditSaveAction and added test cases
1. fix some hard coded ".com" in backdoor test
2. fix email in reminder test
fix tests
add test data param to block testing data
add comment for "ifShowTestData" param
1.revert email in AutomatedSessionRemindersTest.json
2. fix testing account checking logic
fix testing account checking logic
modify some json file to eliminate testing instructor accounts with "real" institute
Merge branch 'master' of https://github.com/TEAMMATES/repo
1. update two tests to using ".tmt" for testing student
2. update script to ignore testing data
3. add counting unique student
change back all "tmt" to "com" for real accounts
[2493]detect and block testing accounts in admin activity log page unless testdata=true -m fixes
[2486]detect and block testing accounts in admin account management page unless all=true

fixes 2486
set email to lower case in set
[2492]Update statistics generator to ignore test data

fixes #2492
[2503]InstructorCourseDetailsPageUiTest failing on live server

fixes #2503
Merge branch 'master' into Issue2473
Added post param check and tests to InstructorCourseInstructorEditSaveActionTest
added post param check and tests to InstructorFeedbackQuestionEditAction