fixing color contrast issues in studio

PLAT-1597 Fix test mongo cleanup hostname in Docker devstack

PLAT-1610 Fix social auth config error in Docker bok-choy tests

PLAT-1323 Remove older, slower code path for course export

AC-727
began changing colors in course content, files and uploads, and when creating a course

finished fixing contrast issues on files and uploads page

fixed advanced settings and issue with hovering in files and uploads

fixed color issues in studio home page and when hovering

fixed contrast in updates, pages, textbooks, and group configurations

fixed issues when configuring a section of a course in course outline

fixed hovering colors to make contrast more visible

fixed colors on the green button

AC-727

Ibrahimahmed443/wl 1078 program details changes

This endpoint allows the Rapid Experiments Team to quickly update data for multiple learners.

Refactor heartbeat endpoint for extensibility

Upgrade django-pyfs to 1.0.6

ENT-447 Add flag to third party auth SAML provider to send to the registration page first

catch InvalidKeyError

Add optional support for Unicode usernames

We may want to add additional heartbeat checks, particularly depending
on the context (e.g. different environments). This is meant to be a
start at enabling a more plug-in style heartbeat check that provides
more detailed diagnostics if desired.

Use the right helper function for finding course upgrade price for th…

Refactoring: Use format with named variables

Only display updates course tool when updates exist.

Created new embargo check api

Revert "Bump problem builder to v2.6.9."

LEARNER-1523
LEARNER-1524

Assuring that courses without updates cannot see the updates link from the home page and that the update message does not throw an error upon loading from a direct URL without any updates. Added test to assure this behavior and fixed up welcome message tests.

Bump problem builder to v2.6.9.

Add cert task fire on whitelist append

Add feature flag to disable email address changes.

PLAT-1229 Support for JS tests in Docker devstack

Fix sysadmin csv download as unicode

Add support for CommonsChunkPlugin for Webpack.

Remove mock-django dependency

Upgrade django-statici18n to 1.4.0