verify_networks failed due to nodes are inaccessible via mcollective

[Ivan Suzdal]

Detailed bug description:
For some reason verify_network task failed with 'Method verify_networks. Network verification not available because nodes ["1", "2", "3", "4", "5", "6"] not available via mcollective.
Inspect Astute logs for the details'.

astute.log contains:
"""
2017-02-17 11:04:51 INFO [19461] Casting message to Nailgun:
{"method"=>"verify_networks_resp",
 "args"=>
  {"task_uuid"=>"a1371c78-17e8-43f9-952f-2db205d73d30", "status"=>"running"}}
2017-02-17 11:04:51 INFO [19461] Processing RPC call 'verify_networks'
2017-02-17 11:05:01 ERROR [19461] Error running RPC method verify_networks: Network verification not available because nodes ["1", "2", "3", "4", "5", "6"] not available via mcollective, trace:
["/usr/share/gems/gems/astute-10.0.0/lib/astute/orchestrator.rb:218:in `validate_nodes_access'",
…
 "/usr/share/gems/gems/astute-10.0.0/lib/astute/server/server.rb:106:in `block in perform_main_job'"]
"""

When I reverted snapshot, I've been able to ping nodes via 'mco ping':
"""
# mco ping
bootstrap time=81.86 ms
master time=84.37 ms
bootstrap time=87.86 ms
bootstrap time=90.96 ms
^C
"""
But it looks like nodes has different names than astute expect.

Reproducibility:
I've seen it at least three times. List of failed jobs:
https://packaging-ci.infra.mirantis.net/job/10.0-pkg-mos-systest-ubuntu-xenial/622
https://packaging-ci.infra.mirantis.net/job/10.0-pkg-mos-systest-ubuntu-xenial/625
https://packaging-ci.infra.mirantis.net/job/10.0-pkg-mos-systest-ubuntu-xenial/626

[Ivan Suzdal (isuzdal)]

It happened due to desync fuel-agent packages for master node and slaves