Implement txcouchbase test suite

Some initial work was completed, but now that the API has stabilized we should make sure we have a txcouchbase test suite that is working and run it periodically in the Jenkins pipeline(s).

This ticket should be split up after the collection test tests are setup and working. That test class will server as the baseline for the rest of the tests in the test suite.

Split into the following once initial work is complete:

• diagnostics API (includes tests)
• streaming test suite (API is already in place, tests need to be added)
• mgmt API (includes tests)
• txns (includes tests)
• misc test suite (rate limiting...tbd).