[devops][2.9] BadHostKeyException when time-sync because of paramiko update

[Vladimir Jigulin]

Used devops version: git+git://github.com/openstack/fuel-devops.git@2.9.23

Detailed bug description:
Changes introduced in paramiko==2.2.0
https://github.com/paramiko/paramiko/commit/4e973d97b0baf8fc9b7b5fbd84af4a869829dce5#diff-169e8b6af6ef7bee0bb2c9a6a637aa5f
cause time-sync fail when trying connect to slave node:

    self.env.revert_snapshot(snapshot_name)
  File "/home/jenkins/workspace/9.x.tempest.create_env/fuelweb_test/models/environment.py", line 321, in revert_snapshot
    self.sync_time()
  File "/home/jenkins/workspace/9.x.tempest.create_env/fuelweb_test/models/environment.py", line 146, in sync_time
    new_time = sync_time(self.d_env, nodes_names, skip_sync)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/retry.py", line 27, in wrapper
    return func(*args, **kwargs)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ntp.py", line 36, in sync_time
    with GroupNtpSync(env, node_names) as g_ntp:
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ntp.py", line 293, in __init__
    remote = get_node_remote(env, node_name)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/helpers.py", line 185, in get_node_remote
    keys=get_private_keys(env)))
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 251, in __call__
    auth=auth)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 365, in __init__
    self.__connect()
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/retry.py", line 27, in wrapper
    return func(*args, **kwargs)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 455, in __connect
    log=True)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 123, in connect
    client.connect(**kwargs)
  File "/home/jenkins/qa-venv-9.2/local/lib/python2.7/site-packages/paramiko/client.py", line 380, in connect
    raise BadHostKeyException(hostname, server_key, our_key)
BadHostKeyException: (u'10.109.13.3', <paramiko.ed25519key.Ed25519Key object at 0x7f0284af1810>, <paramiko.ed25519key.Ed25519Key object at 0x7f0284abeed0>)

Steps to reproduce:
dos.py time-sync envname
dos.py revert-resume envname snapshotname also affected
slaves (not admin) with installed system must be exists in env

Reproducibility: 100%
Workaround: Use paramiko==2.1.2

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: release/2.9
Review: https://review.openstack.org/474182

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/474185

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/474182
Committed: https://git.openstack.org/cgit/openstack/fuel-devops/commit/?id=d9facdcd975f6e2557a1bfaacdfff853c5d9e7e4
Submitter: Jenkins
Branch: release/2.9

commit d9facdcd975f6e2557a1bfaacdfff853c5d9e7e4
Author: Vladimir Khlyunev <email address hidden>
Date: Wed Jun 14 16:10:08 2017 +0400

    Ignore BadHostKeyException while trying ssh keys

    New version of paramiko uses BadHostKeyException as error when smth wrong
    with keys from known_hosts and current public key.

    Change-Id: I3ea9a1953b4e6daf33265600681c85cd2cd28828
    Closes-bug:1697690

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/474185
Committed: https://git.openstack.org/cgit/openstack/fuel-devops/commit/?id=3cb41214b566b116c4d33e906f3b3f25117a6a9b
Submitter: Jenkins
Branch: master

commit 3cb41214b566b116c4d33e906f3b3f25117a6a9b
Author: Vladimir Khlyunev <email address hidden>
Date: Wed Jun 14 16:10:08 2017 +0400

    Ignore BadHostKeyException while trying ssh keys

    New version of paramiko uses BadHostKeyException as error when smth wrong
    with keys from known_hosts and current public key.

    Change-Id: I3ea9a1953b4e6daf33265600681c85cd2cd28828
    Closes-bug:1697690

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/474194

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/474194
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=1acd2425e2eeb10c26bd655e192b7d11cd22b36f
Submitter: Jenkins
Branch: stable/mitaka

commit 1acd2425e2eeb10c26bd655e192b7d11cd22b36f
Author: Vladimir Khlyunev <email address hidden>
Date: Wed Jun 14 17:05:13 2017 +0400

    Unlock fuel-devops' release/2.9 branch

    We can not tag commits anymore but we still need to
    fix bugs in fuel-devops from times to times and receive this fixes.

    Change-Id: I275a97343b0abe9d974f45fd313a44c0c42a862e
    Related-bug: 1697690