Fix embargo migration to the new data models.

The previous version of this migration incorrectly handled
disabled configuration.  When configuration is disabled,
the embargoed country field was the empty string; calling
str.split(",") produced a list with a single empty list entry,
which is not a valid country code.

Vote buttons should be disabled while in use

Add InvoiceHistory model to record changes to invoices

Fixed ajax login when advanced security check is on for NoneType user.

Release

TNL-1352

Enable split for new courses.

ECOM-1045: Add messaging for when students miss the verification deadline

xml_importer now calls store.has_course even if create_course_if_not_present is False.

TNL-1362

Split modulestore throws duplicate errors if course locator is not unique.

With split, "name" returns "course" instead of the run name.

Don't instantiate bogus modulestores just to get template rendering in o...

Aamir khan/ecom 996 country access settings

Testing migration from old mongo to split.

Tests verify operation counts for old mongo. Should be extended to split in the future.

Cannot create an xblock in a course that doesn't exist.

make_asset_key does not start with "/" for split locators.

"run" should not be passed in kwargs to create.

Cannot hold on to xblock references.

Have not been able to work out why.

Get updated xblocks from modulestore before checking properties.

Note that now 2 courses can be imported where the only difference between them is run.

export_courses_to_output_path uses old mongo locator to create directory structure.

The way that assets are accessed (the usage of _id) seems specific to old mongo and fails with split.

Add tests of PLAT-417

Add Django admin UI for configuring country access

Migrate existing embargo rules into the new tables.

ECOM-996: updated the middleware to use new models and access rules

ECOM-996: added the flag to support old and new formats

ECOM-996: added the api layer for country access settings

ECOM-996: added the api layer for country access settings

ECOM-996 implementing the white and blacklist checks.

ECOM-996 minor re-factoring in api.

ECOM-996 minor re-factoring in api.

ECOM-1025 refactoring the code according to PR feedback.

ECOM-1025 refactoring the code according to PR feedback.

ECOM-1025 deleting cache in model save and delete methods

ECOM-1025 adding basic api test cases file.

ECOM-1025 refactoring the code according to PR feedback.

ECOM-1025 refactoring the code according to PR feedback.

ECOM-1025 refactoring the code according to PR feedback. adding the test cases.

ECOM-1025 removing extra line

ECOM-1025 removing un-used function.

ECOM-1025 removing un-used function.

ECOM-1025 re-factor the code.

ECOM-1025 re-name the test file to test_middleware_access_rules.py. we already had old test_middleware.py

ECOM-1025 adding test cases for newly added models.

ECOM-1025 adding test cases and resolve conflicts.

ECOM-1025 fixing the quality and pep-8 issues.

ECOM-1025 re-factoring the code according to the PR feedback.

ECOM-1025 re-name the variable name.

ECOM-1025 removing the _check_ip_lists and its test cases. also added few missing scenarios test cases.

ECOM-1025 removing un-used line.

Show ordinary receipt unless the student is in the payment flow.

Remove submission of verification attempt in shopping cart

Remove submission of verification attempt in shopping cart, since it's no longer needed with the new payment/verification flow.