BOM-897: add newrelic metrics and trace details

Add ADR for relative courseware dates

Add newrelic metrics and trace details to determine performance issue
in CourseListView.

BOM-897

Stop showing certificate information on profile page if there is no
active certificate configuration.

PROD-1200

Currently there is no option to schedule bulk emails to be sent
out at a specific time for instructor led courses. It would reduce
the effort required to create an engaging course if instructor led
course teams had the option to turn on weekly highlight emails as
well.

PROD-575

Limiting dataset for notify_credentials job

notify_credentials job when executed without
any restriction consumes a lot of memory
because of huge dataset that  makes
it unsuable to be executed periodically.
This patch would time bound it to only work
on last day dataset.

PROD-1190

Need to pass certificate status incase `DISABLE_HONOR_CERTIFICATES`
feature flag is ON.

PROD-60

This reverts commit cdb06198,
which itself reverted 3ca00621.

The original commit (3ca006) was reverted because it was suspected
that it was causing unexpectedly-increased memcached usage and
500s in the Gradebook API. It is not clear whether that is actually
the case. We are optimistically reinstating 3ca006 and will monitor
production to see if there is an adverse effect.

MST-105

Updated the django-ratelimit to add support for Django 2.2

If there is no dropdown for a course but there is another course in program
which have a dropdown, $('.run-select').val() returns that run's value. Fixed
by using $el.

PROD-1217

Order history removed from dashboard

Learner who have already earned PDF honor certificates in old courses
are unable to see the certificate links on dashboard and course progress
pages since `course.cert_html_view_enabled` is deprecated and default to
True for all courses.

PROD-60

Updating the django-rate-limit requirement.
updated the django-ratelimit to use unreleased version that supports Django 2.2

add stubbed api functions, tests

Otherwise it fails to go fullscreen before playback

Unpin edx-rest-api-client and make upgrade.

upgrade edx-enterprise to 2.1.4

[REV-1071] add more incomes

[TNL-7051] Clicking a video XBlock's fullscreen button now takes the video fullscreen instead of full window.

Gracefully fallback to full window if fullscreen apis are absent

Warning added in admin

PROD-1153

modify URL generation in tinymce editor

BOM-1143 Django-auth-toolkit update

Django-auth-toolkit update

Pinned the latest commit from github to get Django2.2 support in testing.
Pinned the zipp<2.0.0 to get Python<3.5 support too.

This reverts commit 3ca00621.