Merge pull request #1524 from MITx/feature/vik/check-if-submission-allowed

common/lib/xmodule/xmodule/combined_open_ended_module.py

...b/xmodule/xmodule/js/src/combinedopenended/display.coffee

...le/xmodule/js/src/peergrading/peer_grading_problem.coffee

...pen_ended_grading_classes/combined_open_ended_modulev1.py

.../open_ended_grading_classes/combined_open_ended_rubric.py

...dule/open_ended_grading_classes/grading_service_module.py

...open_ended_grading_classes/open_ended_image_submission.py

...e/xmodule/open_ended_grading_classes/open_ended_module.py

...dule/xmodule/open_ended_grading_classes/openendedchild.py

...module/open_ended_grading_classes/peer_grading_service.py

...dule/open_ended_grading_classes/self_assessment_module.py

common/lib/xmodule/xmodule/peer_grading_module.py

common/lib/xmodule/xmodule/tests/__init__.py

...djangoapps/open_ended_grading/open_ended_notifications.py

lms/djangoapps/open_ended_grading/staff_grading_service.py

lms/djangoapps/open_ended_grading/views.py

lms/envs/test.py

lms/static/coffee/src/open_ended/open_ended.coffee

lms/static/coffee/src/staff_grading/staff_grading.coffee

lms/templates/combined_open_ended_status.html