Add check nodes availabilities via mcollective

Network validation could take a lot of time
especially if nodes not availablity via mcollective

Before network check we just run mcollective check
and if it failed, report about it and do not
run network check.

Change-Id: I91e0a764faa987a49b1b9b81e0e30529535a3acb
Closes-Bug: #1394973
Merge "Add check nodes availabilities via mcollective"