[SWARM][7.0] test cli_node_deletion_check has failed on node deletion

[Dmitry]

Run test cli_node_deletion_check that includes:

1. Revert snapshot 'cli_selected_nodes_deploy'
2. Check 'slave-03' is present
3. Destroy 'slave-03'
4. Wait until 'slave-03' become offline
5. Delete offline 'slave-03' from db

Actual result:
Node as remote has no attribute 'open_session' while deleting.
Test has status:
File "/home/jenkins/qa-venv-7.0/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 745, in execute_async
    chan = self._ssh.get_transport().open_session()
AttributeError: 'NoneType' object has no attribute 'open_session'

https://patching-ci.infra.mirantis.net/job/7.0.system_test.ubuntu.command_line/60/testReport/(root)/cli_node_deletion_check/cli_node_deletion_check/

https://github.com/openstack/fuel-qa/blob/stable-mu/7.0/fuelweb_test/tests/test_cli.py#L369

Need to add "with self.env.d_env.get_admin_remote() as remote" before deleting node.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable-mu/7.0
Review: https://review.openstack.org/391783

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/391783
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=cd918b0ec65d1652bfd21c157bfc8208edee2578
Submitter: Jenkins
Branch: stable-mu/7.0

commit cd918b0ec65d1652bfd21c157bfc8208edee2578
Author: Vladimir Jigulin <email address hidden>
Date: Mon Oct 31 13:47:36 2016 +0300

    Fix cli_node_deletion_check connection handling

    Handle ssh connection loss after node destroying
    Also wrap connections with context manager

    Change-Id: Iefeee00edabda606e28038169b5f4c99029c1d55
    Closes-bug: #1634835

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/7.0
Review: https://review.openstack.org/392550

[OpenStack Infra (hudson-openstack)]

Change abandoned by Vladimir Khlyunev (<email address hidden>) on branch: stable/7.0
Review: https://review.openstack.org/392550