[systest] Root password changing doesn't work in tests: 'AuthenticationException: Authentication failed.'

[Artem Panchenko]

It is possible to change default root password for Fuel master node in system tests:

https://github.com/openstack/fuel-qa/blob/master/fuelweb_test/settings.py#L484-L487

But currently that feature doesn't work, because tests are trying to log in to master node via SSH with new password, before credentials are changed:

2015-12-13 20:46:51,982 - DEBUG helpers.py:255 -- Connect to '10.109.10.2:22' as 'root:ceph1'
2015-12-13 20:46:51,994 - INFO transport.py:1545 -- Connected (version 2.0, client OpenSSH_6.6.1)
2015-12-13 20:46:54,279 - INFO transport.py:1545 -- Authentication (password) failed.

Traceback (most recent call last):
  File "/usr/lib/python2.7/unittest/case.py", line 331, in run
    testMethod()
  File "/usr/lib/python2.7/unittest/case.py", line 1043, in runTest
    self._testFunc()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/case.py", line 296, in testng_method_mistake_capture_func
    compatability.capture_type_error(s_func)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/compatability/exceptions_2_6.py", line 27, in capture_type_error
    func()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/proboscis/case.py", line 350, in func
    func(test_case.state.get_state())
  File "/home/jenkins/workspace/8.0.custom_system_test/fuelweb_test/helpers/decorators.py", line 80, in wrapper
    result = func(*args, **kwargs)
  File "/home/jenkins/workspace/8.0.custom_system_test/fuelweb_test/tests/base_test_case.py", line 132, in setup_master
    self.env.setup_environment()
  File "/home/jenkins/workspace/8.0.custom_system_test/fuelweb_test/models/environment.py", line 437, in setup_environment
    self.wait_for_external_config()
  File "/home/jenkins/workspace/8.0.custom_system_test/fuelweb_test/__init__.py", line 57, in wrapped
    result = func(*args, **kwargs)
  File "/home/jenkins/workspace/8.0.custom_system_test/fuelweb_test/models/environment.py", line 511, in wait_for_external_config
    with self.d_env.get_admin_remote() as remote:
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/models/environment.py", line 381, in get_admin_remote
    password=password)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/models/node.py", line 168, in remote
    password=password, private_keys=private_keys)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/helpers.py", line 230, in __init__
    self.reconnect()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/helpers.py", line 273, in reconnect
    self.connect()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/retry.py", line 27, in wrapper
    return func(*args, **kwargs)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/helpers.py", line 268, in connect
    password=self.password)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/client.py", line 367, in connect
    look_for_keys, gss_auth, gss_kex, gss_deleg_creds, gss_host)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/client.py", line 584, in _auth
    raise saved_exception
AuthenticationException: Authentication failed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/257070

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/257070
Committed: https://git.openstack.org/cgit/openstack/fuel-qa/commit/?id=0b5351158d5c83a7aedca6a310b38699f1ad53ec
Submitter: Jenkins
Branch: master

commit 0b5351158d5c83a7aedca6a310b38699f1ad53ec
Author: Artem Panchenko <email address hidden>
Date: Mon Dec 14 00:19:05 2015 +0200

    Fix root password changing feature in tests

    Change-Id: I035f110eef97f4edbb96ace989f8a1ec0f9718ef
    Closes-bug: #1525717