Adding NewRelic monitoring to worker tasks
Adding NewRelic monitoring to worker tasks

This wraps each worker order task into a NewRelic BackgroundTask context
for NewRelic to help monitor worker actions.

Also, adding a few LOG.infos to help identify what a worker is doing.

Change-Id: I425058978c6d7688ecafc00c13ba8eddb7122453

cloudkeep/barbican,MCDong/barbican,cloudkeep/barbican,cneill/barbican,openstack/barbican,cneill/barbican,openstack/barbican,MCDong/barbican