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

Refactoring: Use format with named variables

LEARNER-1523
LEARNER-1524

When a user comes in through an sso provider and arrives at the login
or registration page, there is a warning message that comes up to indicate
that the user has to take an action to sign in and register and thus
link their sso account to their edx account. However, it is confusing,
particularly for the enterpise context. This diff disables these messages
from being rendered if these pages are being shown in an enterprise context.

Adding a reviews page to the course and updating the reviews module on the course about page. Removed the existing coursetalk implementation and put it in a fragment, removed the tests as well. Added configuration settings to specify the reviews template as well as the reviews provider. This is all protected by a waffle flag.

[LEARNER-311] Enable a purchase button on the Program page - platform (WL)

- PLAT-1494 since mock-django only seems to support up to Django 1.9a1, and is only used in one file we're opting to try to simplify and remove the dependency.

Store user's preference indefinitely.

LEARNER-1312

Learners now see (on the dashboard) a list of reasons why their verifications were denied.

LEARNER-1486

EDUCATOR-333: Grade each course subsection exactly once; ensure that our stashed, unsaved subsection grades are unique.

PSA was monolothic, now split, with new features, like
a DB-backed partial pipeline. FB OAuth2 version also upped.

Partial pipelines don't get cleared except when necessary.
They persist for special cases like change of browser while
still mid-pipeline (i.e. email validation step).

Refactor, cleanup, and update of a lot of small things as well.

PLEASE NOTE the new `social_auth_partial` table.

EDUCATOR-341

Learners now see a message informing them that their status is denied rather than expired.

LEARNER-1486

If verification status is pending, the top border is now colored blue, in a manner similar to the success and failure states.

LEARNER-1486

When authenticating using an SAML IdP, gather additional user
data besides what is standard. Requires admin to input JSON
in settings to recognize the additional user data.

ENT-448

Hiding 'Resume Course' button for users that are not enrolled in the course and adding test to assure behavior.

This sock sits at the bottom of both the home and the course content pages. It allows the user to click a 'Learn More' button to open a panel that allows the user to navigate to the upgrade checkout page. The sock is only shown for users that have not yet upgraded in a course that has a verification upgrade date that has not yet passed. Python tests cover the various course mode and upgrade dates.

This feature is not always needed and is not properly provisioned for devstacks.

This reverts commit e58e295c.

This is to fix learner-1464