This PR introduces some backend python + REST APIs for storing static
asset files along with an XBlock in a content library. It also updates
the new runtime to be able to load such static asset files.

Example use cases:
* Store an image file with an HTML block and then use the image inline
  in the HTML block.
* Store a PDF file with an HTML block and provide a link in the HTML for
  the learner to download the PDF.
* Store .srt files or even video .mp4 files that belong to a video
  XBlock.

Within the bundle, these static asset files are stored in a "static/"
subfolder of the folder that contains the OLX file. Extending an
existing LMS/Studio convention, a static asset file such as "image.png"
is referenced within the OLX as "/static/image.png" and the URL will be
rewritten by the runtime.

added conditional logs for RCA

enable video url re-write flag for all the courses

Create data migration to populate FBEEnrollmentExclusion Table

Move password reset logic and code to user_authn.

Fix static urls in pdf_viewer.html to correctly display pdf viewer fo…

[REV-693] Create table to keep track of FBE holdback experiment enrollments

updated the csv DictReader to make the csv output compatible across both python versions -BOM-993

REV-705

* Upgraded dependencies

* using six.assertCountEqual

* Fix type mismatches in css migrations

Python Requirements Update

Fix program card for smaller screens like ipad.

Text was overflowing from card on screens containing resolution
between 768 to 810 pixels.

PROD-748

ENT-2437 | get_enterprise_customer_for_learner method replaced with e…

updated the csv reader to make the csv output compatible across both python versions

added the encoding argument to unicodecsv.DictReader method

updated the csv file read process to accomodate different input types

changes made to fix issues with UniversalNewLineIterator

changes made as suggested

changes made as suggested

changes made to fulfill quality check requirement to pass quality check

minor changes

add encoded video key check in video transformer

fix(i18n): update translations

Move RegistrationFormFactory from user_api to user_authn

Use latest sphinxcontrib-openapi on GitHub to get a feature we need

And get_registration_extension_form.

Add more tests of the new round()

Revert "Fix static urls in pdf_viewer.html to correctly display PDF viewer for textbooks"