Check nodes availability using mcollective

If we talk about provisioning operation,
first mcollective operation will be 'erase_node'
from mcollective 'erase_node' agent.

We just need stop deployment if any of nodes
got problem with erasing.

This fix help to detect problem with bootstrap
image as early as possible.

Change-Id: I3047f7cc097eda5e63099f0299f7696c15fba10f
Closes-Bug: #1373988
Merge "Check nodes availability using mcollective"