AN-6318

Authors:
- Dennis Jen
- Daniel Friedman

AN-6158

Also removes the 'problem_attempts' field from the roster entry, since
there's no defined use case.

AN-6151

Update requirements.txt for Analytics API documentation builds - DOC-2538

Changed the requirememts file for documentation builds so that it includes the requirements/doc.txt file instead of the top-level requirements.txt file. The top-level file includes requirements/production.txt, which does not install Sphinx, and also misses required modules for autoclass module imports.

Upgraded pylint to 1.5.0.

Added settings for elasticsearch.

Add label for inter sphinx

And Open edX name

Adds the cumulative_count response

update django-nose

Added cumulative_count field to enrollment/mode endpoint.

Updated problem endpoint to return problem submissions.

* total_submissions and correct_submissions were returning problem part submissions

Incorporate no-id-professional mode into professional enrollments.

Doc: update course video data response values

Updated video endpoints to return users_at_start and users_at_end.

Video data API doc

Update fixture for answer_distribution. 

Make API compatible with old and new answer_dist schema.