fixes signal handling for delete student state

2. Add site configuration overrides to theming/helpers.py
3. Move microsite.get_value from theming/helpers to site_configuration/helpers
4. Move microsite_configuration.microsite.get_value usages to site_configuration.helpers.values

Refactor all S3 code to use the django storage API and add swift
settings for openstack deployments

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

OSPR-1155

Moves ENABLE_INSTRUCTOR_EMAIL and REQUIRE_COURSE_EMAIL_AUTH from settings files
to admin-accessible configuration models. This allows for the bulk email settings
to be modified without a new AMI deploy. See TNL-4504.

Also updates tests:
    -python tests mock out the new configurations in place of the old settings
    -lettuce test has been moved to bokchoy
        (note that there was some loss of coverage here - the lettuce tests had
        been doing some voodoo to allow for cross-process inspection of emails
        messages being "sent" by the server, from the client! In discussion with
        testeng, this seems outside the realm of a visual acceptance test. So,
        the bokchoy test simply confirm the successful queueing of the message,
        and leaves the validation of sending messages to the relevant unit tests.)
    -bok choy fixture has been added, to replace the settings in acceptance.py
    -lettuce and bok choy databases have been updated to reflect the backend changes

The new default is to have bulk_email disabled, we'll need to call this out in the
next OpenEdx release to ensure administrators enable this feature if needed.

OSPR-1155

By default, disable all caching in tests, to preserve test independence.
In order to enable caching, inherit from CacheSetupMixin, and specify
which cache configuration is needed.

[EV-32]

The verification workflow assumes that all verified courses will have a
price. Free verified course modes cause a 404 when the user attempts to
enroll or upgrade.

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

The verification workflow assumes that all verified courses will have a
price. Free verified course modes cause a 404 when the user attempts to
enroll or upgrade.

ECOM-3384

ECOM-2972

Also added reset_test_case() and @modifies_courseware to SharedModuleStoreTestCase.

Revert "More verbose test builds in Jenkins, for debugging."

This reverts commit 58cade4cc4288335026649470a48b7bbca969ee8.

problem from legacy instructor dash to new instructor dash.

Added columns to the CC purchases report. (added Qty and Total Discount. Moved the Total Amount to the last index).
Coupon code report.