Learner grade override

[WIP] Refactor learner profile into openedx/features directory

LEARNER-1855

Fix the BulkEnrollSerializer courses field to internally behave with strings and lists

ENT-512 Revert ENT-457 to avoid production error noise

Show page banner for anonymous and unenrolled users

LEARNER-1697

mark test_problem_type_a11y as flaky

Update Enterprise to 0.38.3 to fix dependency issues

This reverts commit d940bbfd.

This reverts commit add01fdf.

Remove request.POST save - incompatible with DRF v3.6.3.

Fix WL sites from causing multiple zendesk emails

Add support for page banner status messages

WL-1109. Currently the system is using org filters to tag zendesk
tickets. MITxPro uses both MITxPro and MITProfessionalX org filters
to pull courses from both orgs. This is causing multiple emails to
be sent from Zendesk as they are getting tagged with both
whitelabel_MITProfessionalX and whitelabel_MITxPRO. This fix changes
to using SITE_NAME instead.

LEARNER-1890

Bump DRF version to 3.6.3 for eventual Django 1.11 compatibility.

Upgrade djangorestframework-jwt to 1.11.0

fixed files and uploads template in Studio

EDUCATOR-605

fixed template in places that only affect Studio

changed > to dash and article to div

Added translation of aria-label

EDUCATOR-605

Capitalize Files and Uploads

EDUCATOR-605

fixed aria label on div

Staubina/ed 592 tests

Upgrade edx-enterprise package version to 0.38.2.

[ENT-503] Allow configuration of ECOMMERCE_SERVICE_WORKER_USERNAME

Fix course override caching bug.

Upstream the Bulk Enroll API endpoint

LEARNER-1896

with a custom patch needed by edx-platform.
Upgrade django-filter as well to v1.0.4
Import DjangoFilterBackend from the correct module - django_filter.
Add django-filter to INSTALLED_APPS.

Enable conditional pre-start-date access to courses

LEARNER-1854

upgrade jenkins node version to 6.11.1

Repair signal config, certs