Merge pull request #1867 from edx/db/update-factory-boy

common/djangoapps/course_modes/tests/factories.py

common/djangoapps/student/tests/factories.py

lms/djangoapps/courseware/tests/factories.py

lms/djangoapps/django_comment_client/tests/factories.py

lms/djangoapps/instructor_task/tests/factories.py

lms/djangoapps/licenses/tests.py

lms/djangoapps/user_api/tests/factories.py

requirements/edx/base.txt