Fix modules[moduleId] error when running JS tests

Running LMS Karma tests was causing the following error:

  TypeError: modules[moduleId] is undefined
  at /edx/app/edxapp/edx-platform/lms/static/course_experience/js/spec/Enrollment_spec.js:20

The root issue was sinon, as documented here:
  https://github.com/webpack/webpack/issues/304

I tried multiple fixes suggested from that issue until I found one that
worked: https://github.com/webpack/webpack/issues/304#issuecomment-272150177

Certificates: clean up imports and signals

Removing flaky tests

Move default overlay content to themable file

Move default Promo Video html to themable file

update edx-proctoring version

Updated the CourseEnrollment Admin form to correctly handle Course

Merge pull request #17239 from edx/testeng/bokchoy_auto_cache_update_88834860015445be6b1c5d3affbd5afca7e1b59a

Bokchoy db cache update

[LEARNER-3672]

Updated the CourseEnrollment Admin form to convert the Course Strings to
CourseKey or OpaqueKey values as expected.

EDUCATOR-2016 In proctored exams, learner will not receive certificate when marked suspicious

PLAT-1889 Fix URL config and reversal issues

Conditionally display gated content in outline and courseware

reducing logging for EDUCATOR-1290

Remove edx-private.txt from edx-platform and move into configuration

Fix staff override score

Add some more data for debugging bundling test and try potential fix

add modal

PLAT-1831 Install prereqs for tox-based bok-choy and lettuce runs

SFE Version bump

Increased the page size for the entitlements API

If a learner has not accessed/attempted the score override functionality
didn't work. This PR is intended to fix this behaviour and the
override should work regardless of learner has accessed or attempted
a problem or not.

LEARNER-3905: Enable Learner Analytics for staff users.

add waffle flag

Django App Plugins: support for Signal Receivers