Makes use of the new SUBSECTION_SCORE_CHANGED signal to trigger a task that
updates persisted course grade values. We've also renamed SCORE_CHANGED to
PROBLEM_SCORE_CHANGED to head off any issues with unclear signal names.
TNL-5740
clear_student_state(), a method defined by ORA, requires information
about the user making the request. Since this xblock is not bound,
we must provide that information explicitly.
Also added reset_test_case() and @modifies_courseware to SharedModuleStoreTestCase.
Revert "More verbose test builds in Jenkins, for debugging."
This reverts commit 58cade4cc4288335026649470a48b7bbca969ee8.
