Remove unused imports in dialogue vumi_app.py
Failing test illustrating #957
Construct the js config the same way we do for the poll config resource in the dialogue vumi app (resolves #957)
Merge branch 'develop' into feature/issue-957-delivery-class-isnt-determined-properly-for-dialogue-push-triggers
Merge branch 'feature/issue-957-delivery-class-isnt-determined-properly-for-dialogue-push-triggers' into develop
Merge branch 'develop' into feature/issue-822-service-components