Traffic light approval and RT integration

* Adds RT integration in the literature workflow. Currently post to the "Test" queue.
* Adds a new action for approval (remember to run `inveniomanage upgrader run`) that allows for CORE tagging and a modal to specify rejection reason (all integrated with tickets).

This gonna be great, boys! @inspirehep/labs-scrum 
Due to RT REST API restrictions, all ticket messages need to be prefixed with a space..