* Generate common/djangoapps import shims for LMS
* Generate common/djangoapps import shims for Studio
* Stop appending project root to sys.path
* Stop appending common/djangoapps to sys.path
* Import from common.djangoapps.course_action_state instead of course_action_state
* Import from common.djangoapps.course_modes instead of course_modes
* Import from common.djangoapps.database_fixups instead of database_fixups
* Import from common.djangoapps.edxmako instead of edxmako
* Import from common.djangoapps.entitlements instead of entitlements
* Import from common.djangoapps.pipline_mako instead of pipeline_mako
* Import from common.djangoapps.static_replace instead of static_replace
* Import from common.djangoapps.student instead of student
* Import from common.djangoapps.terrain instead of terrain
* Import from common.djangoapps.third_party_auth instead of third_party_auth
* Import from common.djangoapps.track in...

This will remove imports from __future__ that are no longer needed.

https://docs.python.org/3.5/library/2to3.html#2to3fixer-future

This patch would enable a user to run management
command via jenkins job. Verification ids
are injected via a configuration model.

PROD-1005

* fix type mismatch in third_party_auth migrations

* fix type mismatch in verify_student  migrations

* fix type mismatch in video_config  migrations

* fix type mismatch in verified_track_content  migrations

* fix type mismatch in commercemigrations

* fix type mismatch in xblock_config migrations

* fix type mismatch in course_creators migrations

* fix type mismatch in contentstore migrations

* run python modernize

* run isort

Django 2.0 will make this field required for `ForeignKey` and `OneToOneFields`.
In previous versions the option defaulted to `models.CASCADE` when not
specified. This change should make the deprecation warnings in the current
Django version go away.

The migrations where also modified, but the changes should not cause a change in
the database schema since `models.CASCADE` was already the old default.

This reworks what was done #17930, since it had to be reverted from the IDVerificationAggregate migration.
We decided to abandon that model and directly read from both id verification models.

This partially reverts commit ee1c3a45.
The migration files introduced by the commit have been kept since they have been run
already on several enviornments.

These models say they are to be fully removed in Hawthorn, so let's make it happen!

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

ECOM-2552

add new column 'copy_id_photo_from' for 'SoftwareSecurePhotoVerification' model to track initial verification with 'photo_id_key'

* Add verification deadline model.
* Populate verification deadlines from course modes table.
* Update student dashboard to use verification deadlines.
* Update pay-and-verify view to use verification deadlines.
* Simplify Django admin for course modes and add validation.
* Add verification deadline to Django admin for course modes.
* Add UI for when the upgrade deadline is missed in the pay-and-verify flow.

ECOM-1612

ECOM-1477

Added a banner that students can use to dismiss the "you have failed reverification" message.  Also, removed unused code, wired up the sidebar for design

Added verification sidebar, banner for major courseware sections, quality & test improvements

Improved tests, fixed javascript for photocapture, removed extraneous photocapture code, added time & course numbers to templates for design

Quick-and-dirty end-to-end flow, functional for at least the case of one course in need of re-verification.

Ready for design to start taking a look; still needs tests and code cleanup