Fixed AppDynamics and bumped New Relic

* New Relic bumped to 3.9.0
* AppDynamics bumped to 3.9.0.0
  * Artifact now versioned and checksummed
Enabled experimental Java 8 support for New Relic
Merge pull request #635 from typesafehub/fix-appdynamics-and-newrelic

Fix appdynamics and newrelic