Logging to catch duplicate instructor tasks
Merge pull request #2090 from edx/sarina/duplicate-task-logging

Logging to catch duplicate instructor tasks
Fix STUD-1129: handle out-of-range page numbers
Merge pull request #2098 from edx/andya/rc-pagination-fix

Fix STUD-1129: handle out-of-range page numbers
Merge branch 'release'