Use Luigi return codes.

Update Acceptence tests for data czar export key changes

Doc for JSON list input and incremental video.

Doc generation requires a single requirements file

When writing to S3, don't validate the bucket.

If Boto is passed "validate=True", it will require an additional
permission to be present when asked to list all of the keys in the
bucket.  We want to minimize the set of required permissions so we get a
reference to the bucket without validating that it exists.  It should
only require PutObject and PutObjectAcl permissions in order to write to
the target bucket.

This is particularly the case with answer-distribution, which writes out
to a bucket that is used by LMS for course downloads.

Upgrade to fork of Luigi 2.7.

Hive partition overwrite by default

Generate the Hive Table but not Table Data

Reverting this back to using the prior functionality of generating a hive table but not generating the associated data

fixing a bad record ordering for EnrollmentDailyRecord that was causi…

fixing a bad record ordering for EnrollmentDailyRecord that was causing fields to be incorrectly read

Fix isort and pep8 errors.

There were two cases of "E731 do not assign a lambda expression, use a
def", but I just added E731 to the exclusion list rather than
changing that.

Remove unnecessary, slow counters from enrollment.

Unwinding the usage of HiveQueryToMysqlTask in enrollment

Removing HiveQueryToMysqlTask from the codebase and adding in controls for overwrite_hive and overwrite_mysql

Fix HiveQueryToMysqlTask dependency in student_engagement workflow

Introduce pip-compile tooling

The order import query now retrieves the UUID of the course (not to be confused with course run) for which an entitlement was purchased.

LEARNER-1745

Fix source for course_subjects in BigQuery load.

Remove traceback info.

Updated analyze script to support newer releases of EMR.

pycodestyle reads from setup.cfg so there is no need for an additional file.

LEARNER-1745

- All imports have been sorted using isort
- Unused imports have been removed
- isort is now run as part of code quality checks

LEARNER-1745

A Dockerfile is now included so that developers can use a Docker image/container for local testing. Travis now builds the Docker image and runs tests on the container. The image is pushed to Docker Hub for successful master builds.

LEARNER-1745

LEARNER-1745