Historically, the CourseEnrollment model used to have a `course_id`
field.  A lot of tests still call the factory using that.  Instead of a
`course_id` field this model now has a `course` field which is a foreign
key to the CourseOverview model.

The factory still accepts the course_id but uses it to create the
relevant CourseOverview object where necessary.  This commit fixes two
issues with the factory.

1. If the course id is passed in as`course_id` instead of `course__id`
then, the generated CourseOverview does not have the correct course_id.

2. Even though the CourseEnrollment model no longer needs the
`course_id` parameter, we were still passing it through.  We now remove
it so that it is not passed through to the CourseEnrollment model
instantiation.

It conflicts with an underlying related field on that model which seems
to be getting at the same value from the related table.

Add logging for incorrectly instantiating CourseEnrollment models.
This is to catch any places that might break this that are outside of
edx-platform. Django won't accept `course` values that aren't
course_overviews so we don't need extra logic to test that `course`
values are of the correct type.

fixup! Remove the course_id property on student.CourseEnrollment.

This adds contraints to:
kiwisolver: next release only works with python>=3.6

The was run to upgrade:
django-splash
django-wiki
edx-search
The previous versions were constraining django below 2.0.

Co-authored-by: Robert Raposa <rraposa@edx.org>

BOM-1473: Skip tests, failing in django2.1 because app is deprecated

Merge pull request #23532 from edx/iahmad/ENT-2725-Implicit-Enterprise-Selection-When-Enrolling-With-Url

ENT-2725 added support for enrolment urls in multiple enterprise case

Django2.2 Post request update

Updated versions of fixed packages

AA fix mobile reset dates banner

BOM-1497 : POST None failures fixed

Fixes `NoReverseMatch` exception.

`django.urls.exceptions:NoReverseMatch lms.djangoapps.discussion.tasks.send_ace_message`
PROD-1224

BOM-1463

Removed tech email form error templates

BOM-1491

BOM-1490

BOM-1489

Adding missing aap.

Group name
Changed in Django 2.2:
The max_length increased from 80 to 150 characters.

None is not a valid value for posting.

None is not a valid value for posting.

Revert PROD-1395

This reverts commit 3f122027.

[PROD-1287] - Add investigation logs.

We were passing unstripped password value to `authenticate_new_user()`
after creating a user which was resulting in password mismatch and
was raising this error.

PROD-656

Revert "Update the LMS courses API for staff permissions"

* Requiring at least one args in a mutually exclusive group to be set

bulk_change_enrollment requires one of agrs: org or course to be set
for it to function correctly.

* Creating new function to verify initial password hash

Starting with django 2.1, the function is_password_usable no longer checks whether encode
is a valid password created by a django hasher(hasher in  PASSWORD_HASHERS setting)

Adding this function to create constant behavior as we upgrade django versions

Refactor bulk unenroll mgmt cmd

Upgrade edx-when to 1.2.0

This adds django admin access to its models.

AA-93

Bulk unenroll command is not supporting unenrolling all the learners
from multiple courses.This PR will enhance this mgmt cmd so that
it can support un-enrollment of learners from multiple courses.

PROD-1347