More test collection fixes.

[BB-873] Support for filters, and multiple roots in problem response reports

BOM-80

Revert "BOM-70"

Downgrade newrelice version from 5.0.0.124 to 4.20.1.121.

This change adds support for specifying multiple root blocks while generating
problem response reports. It also allows specifying a block type filter so that
only blocks of the filtered types will be included in the report.

Finally, this change also consistenly uses absolute path for the location in the
report instead of relative paths.

Getting 500 error on stage after upgrading to latest version
of newrelice.

BOM-82

BOM-81

openedx.core.djangoapps.ccxcon.tasks.update_ccxcon is not get auto
discovered by celery. Adding it to CELERY_IMPORTS to be explicitly
added.

PROD-283

Fix Unregistered Task

openedx.core.djangoapps.bookmarks.tasks.update_xblock_cache task is not
getting autodiscovered by celery and needs to be imported explicitly

PROD-284

geoip2: update maxmind geolite country database

Feanil/fix some test collection

replaced cStringIO and StringIO imports with import from six

fixed StringIO imports

fixed StringIO imports

fixed XSS python-wrap warning

Change the name of the remote context plugin

Fix some test collection in python 3.

Update linter threshold and add new violations.

EDUCATOR-4543 | Let the program_enrollments overview endpoint return course enrollment information for verified and masters mode enrollments, even if they are not directly tied to a ProgramCourseEnrollment.

DEPR-20 Remove django-openid-auth

remove social auth users command

Add a decorator that checks for course-level permissions

Use a different pytest contexts flag name to not conflict with the in…

The full import path was having issues in python 3 complaining that it
couldn't find the module.