Report the policy bundle name for policy checks

[luhring]

Today, the admission controller uses only the policy bundle ID and the status when receiving policy check information from the Anchore API. The admission controller then produces log entries like this one:

image "ubuntu:latest" with digest "sha256:86ac87f73641c920fb42cc9612d4fb57b5626b56ea2a19b894d0673fd5b4f2e9" PASSED policy checks for policy bundle "2c53a13c-1765-11e8-82ef-23527761d060"

Enhancement: Show the policy bundle name (not just the ID), in order to make it easier for users viewing the logs to know which policy bundle is creating a pass/fail result to occur in the admission controller.