XD-1159: Add mongodb sink
Use Jedis (with help from Thomas D)
XD-1787 Validate Bus Deployment Properties

JIRA: https://jira.spring.io/browse/XD-1787

XD-1787 PR Comments

- minor fixes
- Separate validation for producer and consumer props

XD-1787 JavaDocs
XD-1804: Remove 'substream' support