Comment 6 for bug 1503210

Reviewed: https://review.openstack.org/252937
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=3cb2275954b0855cf7caff3a8899172401ad34ce
Submitter: Jenkins
Branch: master

commit 3cb2275954b0855cf7caff3a8899172401ad34ce
Author: vgorin <email address hidden>
Date: Thu Dec 3 15:53:14 2015 +0300

    Introduction of new method of SSH connection

    - Create Singletone to use it as metaclass in ssh_manager.
      Singleton provides us posibility of having only one instance of class.
    - Create SSHManagaer, wich will manage SSH connections by itself.
      Almost SSHClient methods was duplicated in SSHManager.
      Now it used so:
        SSHManager().method(node_ip, *parameters)
      We will not get back SSHClient, we will just say 'Do IT on NODE with this PARAM'
      e.g SSHManager().execute_on_remote('127.0.0.1', 'bash_command')
    - Use ssh_manager in cli_cluster_deletion test

    Change-Id: I307d7d71e814b67d20cc0b4648cf6a7dac4a7829
    Closes-Bug: #1503210