[LTI Provider] Refactoring to remove the lti_run method

Make the release script use the primary email from people.yaml

Fixed 'play_video' event which was emitting with wrong params.

This change is a follow-up to the chages in PR 8347, which removed the
edX login page from the workflow for a new user. Where previously we
redirected a user to the login page, PR 8347 instead creates a new user
transparently and logs them in.

The initial reason for splitting the LTI view between lti_launch and
lti_run was so that there was a target for the GET request that
followed the login page. Since we no longer use the login page, we
no longer need the second view. We also don't need to store the LTI
parameters in the session any more, since they are not persisting
between calls. This simplifies the view logic significantly.

The other change here is to fetch the LtiConsumer object early in
the view, and pass it to the SignatureValidator and scoring system.
When the views were split, this required multiple DB hits for the
same data; we're now only fetching it once.

"play_video" event emitted after seeking forward in a video contains old position

ECOM-1601: Added the help link of credit info

[NEW] - Fixed randomized problems which were not appearing to work.

Remove the DjDT profiling panel from devstack.py. It appears to cause…

mattdrayer/num-queries-fix: Update query value to reflect new reality

Fixing aria values and contrast for accessibility

ziafazal:SOL-1011: Certificate URL should use 'download_url' field and not 'verify_uuid'

Merge release into master

Remove the DjDT profiling panel from devstack.py. It appears to cause horrendeous performance issues, while offering very little benefit.

Conflicts:
	common/djangoapps/student/views.py
	openedx/core/djangoapps/credit/tests/test_api.py

Feature flag credit provider messaging on the dashboard.

Revert "Adding entries of Call Stack Manager in StudentModule and Stu…

flag test as flaky

Update docs for testing common requirejs tests

Fixed misordered settings for devstack environment

Creating Zendesk refund notifications via API

Default "Course About" image

Refund notifications are now created using the Zendesk API. This ensures the correct requester information is set for the ticket, and allows for tagging of tickets.

XCOM-451

LMS: Modification in enrollment API

ziafazal/SOL-1006: Disable course 'start date' for inactive web-enabled certificates

Mention Confluence in the README

ziafazal/SOL-1008: Ensure that only authorized actors can perform assigned roles

asadiqbal08/SOL-1014: Improved text in Studio Certificate Configuration

When the credit eligibility is disabled, skip the code
that access the CreditProvider table.  This will allow us
to safely delete a column from the table in rc/2015-07-08.

Changed enrollment api to set enrollment atributes if the course is
credit course

ECOM-1719

Adding entries of Call Stack Manager in StudentModule and StudentModuleHistory

Enable CallStackManager on StudentModule and StudentModuleHistory to capture any use outside of DjangoXBlockUserStateClient