Fix for Swagger error

Mergeback PR from private to public.

Sustaining/security fixes 3

AA-126: Expose more course-outline info to learning MFE

- Use the same get_course_outline_block_tree call that the current
  outline uses
- Show number of problems in subsection display names
- Don't send links if the user is not enrolled or course isn't public
- Send subsection icons to MFE
- Send subsection descriptions to MFE
- Send completion info to MFE

https://github.com/edx/edx-platform/pull/24803

Fix timer text wrapping on smaller screens

AA-314/AA-330: Updates to courseware due date.

This will fix a bug about if assignment type is None, we will only
show the due date.
This will also fix a bug where we would show the assignment type and
due date on non-scored units within a subsection. Now it will only
show on scored units.
This also fixes the pill that displays from stretching out if the due
date text is multi-lined.

Mergeback PR from private to public.

Adding debug logs for CR-2618

The LEPL dependency was triggering a lot of deprecation warnings of the
form:

    venv/lib/python3.5/site-packages/lepl/matchers/support.py:497:
    DeprecationWarning: inspect.getargspec() is deprecated, use
    inspect.signature() instead
    argspec = getargspec(func)

It turns out that LEPL was only used by the rfc6266_parser package, which
itself was only used in one place to generate utf8-compliant
Content-Disposition headers.

This issue was noticed here:
https://github.com/SWW13/python-rfc6266-parser/issues/2
Unfortunately it is quite difficult to extract LEPL from the
rfc6266-parser package.

The rfc6266-parser package (https://pypi.org/project/rfc6266-parser/) is
itself a fork of the now-unmaintained rfc6266 package
(https://pypi.org/project/rfc6266/). Thus, it became high time to get
rid of this package. The FileResponse object can appropriately set the
Content-Disposition header, and thus replace the rfc6266 functionality,
since Django 2.0: https://code.djangoproject.com/ticket/16470

In our testing, the FileResponse object correctly set the
`filename*=utf-8''` value, following the RFC. The only difference is
that it does not provide "filename" fallback value, as expressed in the
RFC: https://tools.ietf.org/html/rfc6266#appendix-D

With rfc6266_parser:

    >> import rfc6266_parser
    >> rfc6266_parser.build_header("my_file_é.csv", filename_compat="video_urls.csv")
    b"attachment; filename=video_urls.csv; filename*=utf-8''my_file_%C3%A9.csv"

With FileResponse we have:

    >> from django.http import FileResponse
    >> import io
    >> response = FileResponse(io.StringIO(), as_attachment=True, filename="my_file_é.csv", content_type="text/csv")
    >> response.get("Content-Disposition")
    "attachment; filename*=utf-8''my_file_%C3%A9.csv"

We consider that this is a sufficiently minor difference, that will
impact very few browsers.

AA-125: Add Course Goals to MFE API

Security fix/fix xss in templates

entries

[MICROBA-551]

This fixes wrapping the exam-text bar on smaller screens during timed exams, which prevented users from viewing the exam's content.

Remove problem report and data download logs

ENT-3336: Added default for new enterprise setting INTEGRATED_CHANNELS_API_CHUNK_TRANSMISSION_LIMIT

Merge pull request #24863 from edx/testeng/bokchoy_auto_cache_update_a6bb5986b084ef773ba68686f3221eadd42157af

Bokchoy Testing DB Cache update

Make redis broker compatible with celery 4.0

The main difference between how instructor-paced and self-paced courses
work with respect to the outline on the backend is how we treat the
hide_after_due attribute on subsections (sequences). Namely, self-paced
courses ignore due dates even if they are specified on the sequence
(for example, by OLX import). If hide_after_due is True in a self-paced
course sequence, we only make it inaccessible after the entire course
ends.

This was tracked as BD-29 and TNL-7262.

fixing language issue for original activation email on sites using mo…