Adds cohorts as valid bulk email targets.

TNL-4356

Allows multiple bulk email targets to be specified at once.

-The previous "All" option has been split into "Staff" and "Learners"
-The backend changes made here lay the groundwork for cohort emailing
-The data migration, 0005, is somewhat large and requires deploy attention
-Tests have been updated
-Numerous safe-commit-linter fixes are included

Add bokchoy test and changes in html

Conflicts:
	lms/djangoapps/instructor/tests/test_api.py
	lms/djangoapps/instructor/utils.py
	lms/djangoapps/instructor/views/api.py
	lms/djangoapps/instructor/views/api_urls.py
	lms/djangoapps/instructor/views/instructor_dashboard.py
	lms/djangoapps/instructor_task/api.py
	lms/djangoapps/instructor_task/tasks.py
	lms/djangoapps/instructor_task/tasks_helper.py
	lms/djangoapps/instructor_task/tests/test_api.py
	lms/djangoapps/instructor_task/tests/test_tasks.py
	lms/djangoapps/instructor_task/tests/test_tasks_helper.py
	lms/envs/aws.py
	lms/envs/common.py
	lms/static/coffee/src/instructor_dashboard/data_download.coffee
	lms/templates/instructor/instructor_dashboard_2/data_download.html

Please note that this is a squshed commit and the work of:
Symbolist, macdiesel, nedbat, doctoryes, muzaffaryousaf and muhammad-ammar

problem from legacy instructor dash to new instructor dash.

* added generate certificates task and bok choy tests
* added unit tests
* changes based feedback and improved acceptance test
* Change header text
* changes based on feedback on 24/6
* added task_id to api output
* fixed broken test
* Remove "Instructor" from strings, per Docs team
* Fixed flaky entrance exam test

enroll in a course but have not signed up yet.

- added the abstract and concrete layers of enrollment report provider
- created a celery task.
-added the button in the e-commerce reports section

added the enrollment data backend

added the payment data and start writing the test cases.

updated the code with the feedback suggestions and wrote some test cases.
- all the downloadable reports are now visible in the ecommerce download section.
Pending instructor tasks is also visible in the ecommerce section

added the fields in the user profile information
changed the report store configuration key
added the new http endpoint for financial reports to add more permissions for finance_admin to access.

fix quality issues

added test cases to check csv content data

rebased with master and resolved conflicts

changed the log messages

added the changes as per code clintonb suggestions during code review

updated the test cases for the finance_admin decorator

changes suggested by clinton.

Created and moved Table level filters to the Custom Manager for the CourseEnrollment model.

ecommerce.js file was loaded twice in the instructor_dashboard.js fixed the issues

added the registration code column in the csv

added the full gender in the csv file

Update data sources and add display name translations for the report columns

fix meta name

Make sure the reports section does not appear on non whitelabel courses

pylint fixes

expand out enumerated values

Conflicts:
	lms/djangoapps/courseware/courses.py
	lms/djangoapps/instructor_task/api.py

refined entrance exam student attempts reset
added rescore, delete state and task history functionality

TNL-735

This commit adds the non-courseware lms/djangoapps and lms/lib.

These keys are now objects with a limited interface, and the particular
internal representation is managed by the data storage layer (the
modulestore).

For the LMS, there should be no outward-facing changes to the system.
The keys are, for now, a change to internal representation only. For
Studio, the new serialized form of the keys is used in urls, to allow
for further migration in the future.

Co-Author: Andy Armstrong <andya@edx.org>
Co-Author: Christina Roberts <christina@edx.org>
Co-Author: David Baumgold <db@edx.org>
Co-Author: Diana Huang <dkh@edx.org>
Co-Author: Don Mitchell <dmitchell@edx.org>
Co-Author: Julia Hansbrough <julia@edx.org>
Co-Author: Nimisha Asthagiri <nasthagiri@edx.org>
Co-Author: Sarina Canelake <sarina@edx.org>

[LMS-2370]

that are not present in a given student's gradeset.

General code cleanup and addition of comments.

Instructor dashboard API unit tests.

LMS-58

Hook up display of grade files ready for download to new instructor dashboard.

LMS-58