added priority_router and its testcase
new version of interaction model
modified the dialogue model
added 'priority' when sending messages from dialogue worker
modified ttc_dispatcher.yaml
request and feedback messages will always have priority
check that 'request-and-feedback-prioritized' is set
changed key 'prioritized' to 'set-prioritized' in dialogue model
modified supervisord conf to test bulk pipe
Merge branch 'feature/message_priority_index' into develop
modified ttc_dispatcher.yaml to include bulk pipe on 15001