* Integrating olxcleaner in course import

* Adding toggle removal date and addressing pylint issues.

Revert "Fix code quality test failures"

This reverts commit 8c55e11d.

Revert "Fix celery send_activation_email task failure"

This reverts commit 810eea0e.

Revert "Convert Account Activation Emails to edx-ACE"

This reverts commit 7984c37a.

- Creates a new app under cms
- Sends emails asynchronously on completion of any top-level job
- Moves old user task related cms tests to cms_user_tasks

STUDIO_NAME = "edX Studio"
STUDIO_SHORT_NAME = "Studio"

For theming and internationalization

The right parenthesis should be appeared before the method '.format', not after.

Also fixes a bug where message was not sent to user when entering 'denied'
state unless the user was previously in 'granted'.

Send notification to admin when a user enters 'pending' state.

Pylint cleanup.

* Enable account creation
* Some code cleanups
* Fix access to nonexistent fields in the account creation view
* Formatting fixes