Merge branch 'master' into rebase-juniper-updated

# Conflicts:
#	.circleci/config.yml
#	README.rst
#	common/lib/xmodule/xmodule/modulestore/mongo/base.py
#	common/lib/xmodule/xmodule/modulestore/tests/factories.py
#	common/lib/xmodule/xmodule/modulestore/tests/test_split_mongo_mongo_connection.py
#	common/lib/xmodule/xmodule/mongo_utils.py
#	lms/djangoapps/dashboard/git_import.py
#	lms/djangoapps/verify_student/tests/test_services.py
#	openedx/core/djangoapps/user_api/completion/tasks.py
#	requirements/edx/base.txt
#	requirements/edx/custom.txt
#	requirements/edx/development.txt
#	requirements/edx/paver.in
#	requirements/edx/paver.txt
#	requirements/edx/testing.txt

README.rst

@@ -2,6 +2,9 @@ This is the core repository of the Open edX software. It includes the LMS
 (student-facing, delivering courseware), and Studio (course authoring)
 components.
 
+Notice: This repo will be archived in April 2021.
+#######
+
 Installation
 ------------