TNL-1493

See https://openedx.atlassian.net/wiki/display/TNL/User+API for details

The new "country access" implementation replaces the old
implementation.  Middleware and tests have been updated
accordingly, but deprecated models are preserved
for backwards compatibility.

Users who are blocked from enrolling in a course
due to an embargo are redirected to the blocked
message page after authentication completes.

The existing pattern of using `override_settings(MODULESTORE=...)` prevented
us from having more than one layer of subclassing in modulestore tests.

In a structure like:

    @override_settings(MODULESTORE=store_a)
    class BaseTestCase(ModuleStoreTestCase):
        def setUp(self):
            # use store

    @override_settings(MODULESTORE=store_b)
    class ChildTestCase(BaseTestCase):
        def setUp(self):
            # use store

In this case, the store actions performed in `BaseTestCase` on behalf of
`ChildTestCase` would still use `store_a`, even though the `ChildTestCase`
had specified to use `store_b`. This is because the `override_settings`
decorator would be the innermost wrapper around the `BaseTestCase.setUp` method,
no matter what `ChildTestCase` does.

To remedy this, we move the call to `override_settings` into the
`ModuleStoreTestCase.setUp` method, and use a cleanup to remove the override.
Subclasses can just defined the `MODULESTORE` class attribute to specify which
modulestore to use _for the entire `setUp` chain_.

[PLAT-419]

Makes logistration available at /login and /register as well as /accounts/login/ and /accounts/register/. In addition:

- Adds support for redirect URLs in third party auth for combined login/registration page
- Adds support for external auth on the combined login/registration page
- Removes old login and registration acceptance tests
- Adds deprecation warnings to old login and register views
- Moves third party auth util to student_account
- Adds exception for microsites (theming)

Internationalize error messages for password reset on the new login page.

Fix all the 3rd party auth scenarios.

Update pipeline to preserve parameters.

Updating tests

Revert "If feature flag is enabled, replace the old login/registration pages with the new combined login/registration page."

This reverts commit f40447b3.

Conflicts:
	lms/urls.py

Revert "Add support for external auth on the combined login/registration page"

This reverts commit 98875339.

Conflicts:
	lms/templates/courseware/mktg_course_about.html
	lms/urls.py

TNL-649

Add support for redirect URLs in third party auth for combined login/registration page

Remove old login/registration acceptance tests

Add deprecation warnings to old login and register views

Move third party auth util to student_account

Add exception for microsites

Add CSRF check for login/registration views.

Also fixes failing Python unit tests

Change third party auth login failure code to a 401, to detect authentication
success with no linked account.

If already authenticated, redirect immediately to the dashboard.

Use "Location" header correctly for 302 redirects from student views.

Add utility functions for simulating a running third-party auth pipeline.

Add a utility function for checking whether third party auth is enabled.

Respect default values sent by the server

Remove hard-coded TOS checkbox in registration template.
Disable new dashboard in settings; expose password reset end-point in student account app.
Added empty JS tests for new JavaScript

Reset the correct URLs module to fix test failures.

Fix third party auth to reconfigure the registry on test cleanup.

The next step in the password reset process (confirmation) continues to be handled by student.views.password_reset_confirm_wrapper, a custom wrapper around Django's password reset confirmation view.

Validate student account and profile form fields. Use RequireJS for Jasmine tests of account and profile JS.

Add Python APIs for account/profile information to user_api
Updating profile page to have social linking

Authors: Renzo Lucioni, Alasdair Swan, Stephen Sanchez, Will Daly