This will leverage the nose attrib plugin to allow us
to break tests apart on our build system to run
in parallel on separate nodes.

When creating profile images from an uploaded file, ensure that EXIF
orientation information is preserved, so profile images appear
right-side-up.

https://openedx.atlassian.net/browse/MA-1559

TNL-2180

MA-1416

Created a TypedFileUploadParser that validates the mimetype and then
takes the content and puts it on request.FILES['file'].  Subclasses the
existing FileUploadParser.

Use namedtuple in IMAGE_TYPES as per style guide:
https://github.com/edx/edx-platform/wiki/Python-Guidelines#classes-vs-dictionaries

* Fix paver violations to stablize edx-lint update
* Parens, Line2Long
* Fix missing docstrings
* Fix PEP8 issues
* Address PR feedback (thanks @nedbat!)

Deprecate the views at /api/profile_images/v1/{username}/upload and
/api/profile_images/v1/{username}/remove and replace them with GET and
POST methods at /api/user/v1/accounts/{username}/image

* Upgrade edx-submissions
* Upgrade edx-ora2
* Upgrade edx-val
* Upgrade edx-proctoring
* Update all edx-platform code that depends on DRF, including:
  - auth_exchange
  - cors_csrf
  - embargo
  - enrollment
  - util
  - commerce
  - course_structure
  - discussion_api
  - mobile_api
  - notifier_api
  - teams
  - credit
  - profile_images
  - user_api
  - lib/api (OAuth2 and pagination)

* Upgrade edx-submissions
* Upgrade edx-ora2
* Upgrade edx-val
* Upgrade edx-proctoring
* Update all edx-platform code that depends on DRF, including:
  - auth_exchange
  - cors_csrf
  - embargo
  - enrollment
  - util
  - commerce
  - course_structure
  - discussion_api
  - mobile_api
  - notifier_api
  - teams
  - credit
  - profile_images
  - user_api
  - lib/api (OAuth2 and pagination)

TNL-1669

TNL-1860

Conflicts:
	openedx/core/djangoapps/profile_images/views.py

TNL-1537

Co-Authored-By: Andy Armstrong <andya@edx.org>
Co-Authored-By: cahrens <christina@edx.org>