Unsubscribe link added in bulk emails

BOM-1141 Upgrade social-auth-app-django

Dont delete course overviews

Merge pull request #22876 from edx/testeng/bokchoy_auto_cache_update_e00340173c2d18e4052a08fe465230530b2d3202

Bokchoy Testing DB Cache update

Update edx-val from 1.2.0 to 1.2.1

Added the link to latest master commit of GitHub for Django 2.2 support.

Fix footer link for wcag.

BOM-1126

Awais786/bom 1050

Removing the moto.

remove the logs

django-appconf bump version using commit hash for django2.2

BOM-1126

PROD-604

This is step 3 of DE-1824.

Also update:
* six 1.13.0 => 1.14.0
* edx-django-utils 2.0.2 => 2.0.3
* skip test that checks all model changes have migrations.  (We defer
  this to step 4.)

Fix: KeyError: 'source' when parsing HTML5 videos

Add TeamsConfigurationService to lms xblock runtime

Rather than deleting CourseOverviews to update their version numbers, just reload them from the modulestore

This fixes a bug that causes the video XBlock parsing to break in the new XBlock runtime if:
* the html5_sources field is set, and
* the download_video field is not set

The error is:

  File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/xblock/rest_api/views.py", line 52, in render_block_view
    block = load_block(usage_key, request.user)
  File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/xblock/api.py", line 84, in load_block
    return runtime.get_block(usage_key)
  File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/xblock/runtime/blockstore_runtime.py", line 70, in get_block
    block = block_class.parse_xml_new_runtime(xml_node, runtime=self, keys=keys)
  File "/edx/app/edxapp/edx-platform/common/lib/xmodule/xmodule/video_module/video_module.py", line 620, in parse_xml_new_runtime
    setattr(video_block, key, cls.fields[key].from_json(val))
  KeyError: 'source'

The reason for the error is that parse_video_xml() will sometimes return a 'source' attribute in its field_data return value, even though source is not a video field (anymore). This then causes an error when trying to look up cls.fields['source']

A workaround in the meantime is to add download_video="false" to the OLX.

Removing the moto from repo.

Python Requirements Update

Implementation of metadata endpoint for sequence modules

BOM 1087  django-mysql version bump

Removed the version constraint for django-mysql
Also pinned the freezegun version to 0.3.12 as the latest version is causing failures.

BOM-1147 -- Create a code mod for Widget.render change

Upgrading edx-enterprise

* update teams service and api to consider topic

Merge pull request #22853 from edx/revert-22692-juliasq/rename_site_configuration_siteconfiguration_values_1

Revert "Rename values in SiteConfiguration/History (1/3)"

This reverts commit cebeab43.

remove left boarder from upcoming dates