Issue1 build out mbc external applications events

Fixes #1 
Create seperate consumers for the `externalApplicationEventQueue` and `externalApplicationUserQueue` queues. Each consumer framework should consist of:
- [x] Use settings in `mb-settings.json`
- [ ]  Connect to `directExternalApplicationsExchange` exchange
  - [ ] `externalApplicationEventQueue`
- [x] Blocking `consumeMessage` call with callback to Class specific to consumer to process the message contents.