[TEAMMATES#9321] Release 7.0.0-alpha.0 (TEAMMATES#9381)

[TEAMMATES#9320] Release V6.16.0 (TEAMMATES#9326)

[TEAMMATES#9320] Release V6.16.0 (TEAMMATES#9326)

[TEAMMATES#9230] Release V6.15.0 (TEAMMATES#9231)

[TEAMMATES#8957] InstructorCourseDetailsPageUiTest.testRemindAction f…

…ailing on live server (TEAMMATES#9171)

[TEAMMATES#9182] Release V6.13.0 (TEAMMATES#9189)

[TEAMMATES#9141] Release V6.12.0 (TEAMMATES#9142)

[TEAMMATES#9100] Release V6.11.0 (TEAMMATES#9108)