When celery runs in eager mode, there is a bug and an exception
is not thrown when using retry logic. A PR to fix the bug can
be found here: https://github.com/celery/celery/pull/2607

In the mean time, we have to deal with the fact that in eager mode
celery will not throw the exception but simply return it. So we
raise it ourselves.

Changelog for 3.1 can be found here:
  http://celery.readthedocs.org/en/latest/whatsnew-3.1.html

Changelog from 3.1.0 to 3.1.18 can be found here:
  http://celery.readthedocs.org/en/latest/changelog.html

Delete static_tab for split courses raises 500 error

Updated ora release tag.

ECOM-1476: sending email on software secure response initial work

Exclude filtering for microsite orgs

Updated Take Photo page to include verification requirements

As part of the unification of verify later/now, the take photo page needs to list the verification requirements.

XCOM-254

Add params to CS query in thread list endpoint

The thread list endpoint needs to restrict the set of threads it
retrieves if the course is cohorted and the user is not privileged.
This also adds an explicit default sort (by most recent activity).

(SOL-776)(SOL-740)(SOL-532) Prerequisites for course discovery feature

add lettuce features to the omitted directories in coveragerc files

Clean up keyword_substitution.py

Make user_track use eventtracking

add custom PayPal payment button and js tests for buttons.

Hiding Billing Address for Orders without Billing Addresses

fix ecommerce api calls in verify_student and add tests.

Problem builder version bump [OSPR-575]

Problem builder version bump: includes presentation updates and accessibility improvements [OSPR-575]

(SOL-776)(SOL-740)(SOL-532) Added setting flags for COURSE DISCOVERY feature; Exposed course search input as well as the course result page; Added flag for limiting the number of course cards on the homepage;

change photo reverification page heading from h3 to h1

XCOM-287

XCOM-270

Update docstring and remove unused import
This is cleanup after edx/edx-platform#7605

Some orders, specifically those paid for with PayPal, do not have a billing address. This information will not be rendered in such cases.

Clytwynec/unique dirs for test results

Paver: Ability to run only servers or only tests

Enable unit preview by default.