Fixes failing student_testing tests.
Fixes query tests.
Makes student browser tests slightly more robust.
Integrates unit_id and dynamic assets into giving points for practice tests.
Makes device unregistered test more robust by waiting for page change.
First pass implementation of points reset on unit switch.
Merge pull request #2333 from rtibbles/nalanda_rct3_test_fixes

Nalanda rct3 test fixes
Merge branch 'nalanda-rct3' into quiz_summary