Update/brooklyn 060 snapshot rebased for merging

This a copy of the branch https://github.com/cloudsoft/brooklyn-cdh/tree/feature/060-SNAPSHOT-vcloud, but rebased against master so it's mergeable.

The only differences between this PR and the original branch are:
1. most recent commit on master (Fix pom to be valid for maven central) is in this branch.
2. Order of static block and field declaration in DirectClouderaManagerImpl matches that in master rather than this branch (one line moved) - see sensorFeed field in https://github.com/cloudsoft/brooklyn-cdh/blob/master/src/main/java/io/cloudsoft/cloudera/brooklynnodes/DirectClouderaManagerImpl.java