Comment 3 for bug 1587554

1. Python crush is resolver in 2014 (update python on Ubuntu 14.0, it's old and buggy)
2.
  On Fuel-Devops 3.0 memorization for SSHClient is arrived, currently we seriously reduced amount of ssh sessions and introduced session close for nodes on shutdown/destroy/suspend/revert call.
  On Fuel-Devops 2.9 this changes in adoption state (simple cherry-pick is impossible due to significant changes in driver model).
3. Close all session on process close in investigation state (we could close process without shutdown/suspend and snapshot node states, probably fix will be in fuel-qa, but only after requirements bump).