Separate out desired and actual state

[sarun87]

Cluster and Machine objects have two sections spec and status. Ideally the former (spec) should be representative of the desired state while the latter (status) should represent the actual status.

The current implementation uses part of both these sections to identify actual state of the cluster/machine.

Any user configurable settings will need to be specified both in the spec and the status section identifying their desired and actual states.