Change waffle flag for enrollment throttle to switch

add script to detect dead code

Bump poll xblock version to 1.5.1 - removes warning.

[ENT-1029] edx-enterprise version bump 0.69.1

Rate limiting registration form validation end point.

This patch would ratelimit registration form validation
endpoint for anonymous user based on his/her ip.

LEARNER-3810

Revert "Switch container factory to webpack"

Add require_https to all is_safe_url calls

Change usages of is_safe_url to use new allowed_hosts instead of host

Exempt csrf on donate

Revert "OAuth2 API to call XBlock handlers"

PLAT-1746: Use Django 1.11 format_lazy instead of allow_lazy

Switch container factory to webpack

"host" parameter is deprecated and throws a warning

Remove SessionAuthenticationMiddleware from INSTALLED_APPS

Reapplies edx/edx-platform#17509

This reverts commit 0f7e2373.

Upgrade edx-ora2 to 2.1.17

Remove unused pytest markers for Django 1.11 upgrade

Remove temp django upgrade logic

It is always on now, and this is just a deprecated stub which will be
removed in Django 2.0.

PLAT-1524: Add on_delete kwarg to ForeignKey & OneToOneFields