[Syndesis] MongoDB connector - TP features

(Migrated from https://github.com/syndesisio/syndesis/issues/5337)

Author: Heiko Braun
Assignees: Andrej Smigala, Pasquale Congiusti,
As a citizen user I want to be able to connect to MongoDB datastore. I will provide my own connection configuration strings such as:

mongodb://[username:password@]host1[:port1][,...hostN[:portN]]][/[database][?options]]

(See https://docs.mongodb.com/manual/reference/connection-string/)

Acceptance Criteria

• CRUD support

Stretch items

• Adhoc queries (regex, range query)
• Javascript queries
• Aggregation (Map-reduce)
• Force ACID Tranactions

--There is an initial draft of the user doc for this feature.
--The writer acknowledges receiving enough information from engineering to write the initial draft of the user doc for this feature.