- Use correct harvest logic for query aggregator

* Bumps tap version to move beyond handlebars audit warning.

- migrated sql query trace harvest to FEH
- removed unused old harvest tests

* Bumps  dev dependency past audit warning.

* Decouples metric harvest into own standalone scheduled aggregator.

- HTTPS connections to New Relic now use a keep alive HTTP-Agent

* Drops old odd-numbered node versions that are no longer supported by node from
  travis testing.

* Updated the transaction trace aggregator to handle sending its data autonomously.

- Decoupled span event harvest into own standalone scheduled aggregator.

* Decouples Transaction event harvest into own standalone scheduled aggregator.

*  versioned test skips nest SDK version as it has a crashing bug. Resumes
  with the next version assuming there will be a fix.

* Decouples custom event harvest into own standalone scheduled aggregator.

* Changed, added, and removed tests to instrument Restify 7.

* Decouples error trace and error event harvests into own standalone scheduled
  aggregators.

* Distributed Tracing is now enabled by default in serverless mode.

* Made the segment reference on the outbound request non-enumerable.

- Remove serialized mergeServerConfig object from Config object before posting

* Moves transaction_events.max_samples_* config items out of being valid from
  server. These are not valid to receive. Fixed tests and added  cleanup to
  better isolate some test failures.

- Updated Mocha and Docker links in Contributing.md

* The agent will now end/serialize transactions in the event of an uncaught
  exception while operating in serverless mode.