Add history to GeneratedCertificate

DE-1881

Code fix & removed Pylint Warning Supression

update READMEs to clarify responsibilities

Add some clarifications for student, user_api, and user_authn given
the recent clean-up of moving code to the appropriate apps.

ARCH-1248

fix(i18n): update translations

BOM-1088

Upgrade django-ses

BOM-1085

Updated the django-cors-headers to support Django 2.2

update ORA version to use user state service

-bumped django-model-utils version to support django 22

downgrade the django-cors-headers version to 2.5.3

downgrade the django-cors-headers version to 2.5.3

updated the django-cors-headers to version that supports django 2.2

downgrade the django-cors-headers version to 2.5.3

downgrade the django-cors-headers version to 2.5.3

updated the django-cors-headers to version that supports django 2.2

downgrade the django-cors-headers version to 2.5.3

downgrade the django-cors-headers version to 2.5.3

ran make upgrade

ARCH-1253: require POST for login_user

ARCH-1253

Release candidate

make upgrade to get python 3 proctoring fix

ARCH-1253: remove unused /login_post endpoint

BOM-1094

Standardize input into SubRipFile

Python Requirements Update

BOM-1083

Adds optional setting to enable devstack theming

Merge release back to master

Added custom arguments to the back-populate job

BackPopulate Program Credentials job performs data for all the programs
and for all the available learners which takes a lot of time.
Adding in custom arguments will help run this job for specific learners
and specific programs.

Update privacy and TOS links for edge.

Currently,edge environment is serving empty pages against privacy
and TOS.Now, this behaviour is modified by pointing those links to
edX's privacy and TOS pages.

PROD-1066

Export staff users csv