CI test 6.1.mos.deploy-rpm is broken with libvirtError

Detailed bug description:
CI test 6.1.mos.deploy-rpm is broken with errors:
2016-07-20 08:54:20,380 - ERROR decorators.py:93 -- Fetching of diagnostic snapshot failed: Traceback (most recent call last):
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/decorators.py", line 90, in wrapper
    "fail", name)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/decorators.py", line 343, in create_diagnostic_snapshot
    task = env.fuel_web.task_wait(env.fuel_web.client.generate_logs(), 60 * 5)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/__init__.py", line 48, in wrapped
    result = func(*args, **kwargs)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/decorators.py", line 130, in wrapped
    response = func(*args, **kwargs)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/models/nailgun_client.py", line 320, in generate_logs
    return self.client.put("/api/logs/package")
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/http.py", line 84, in put
    return self._open(req)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/http.py", line 93, in _open
    return self._get_response(req)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/http.py", line 110, in _get_response
    return self.opener.open(req)
  File "/usr/lib/python2.7/urllib2.py", line 404, in open
    response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 422, in _open
    '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1214, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib/python2.7/urllib2.py", line 1184, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno 113] No route to host>

2016-07-20 08:54:35,388 - ERROR decorators.py:99 -- Fetching of raw logs failed: Traceback (most recent call last):
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/decorators.py", line 95, in wrapper
    admin_remote = args[0].env.d_env.get_admin_remote()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/models/environment.py", line 429, 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 175, in remote
    password=password, private_keys=private_keys, auth=auth)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 235, in __call__
    ssh.reconnect()
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 533, 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/ssh_client.py", line 446, in __connect
    log=True)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/helpers/ssh_client.py", line 120, in connect
    client.connect(**kwargs)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/client.py", line 324, in connect
    raise NoValidConnectionsError(errors)
NoValidConnectionsError: [Errno None] Unable to connect to port 22 on 10.109.15.2

2016-07-20 08:54:46,139 - INFO decorators.py:295 -- <<<<<****************************************************************************************************>>>>>
2016-07-20 08:54:46,139 - INFO decorators.py:296 -- Failed in method 'prepare_release'. Make snapshot: error_prepare_release
2016-07-20 08:54:46,139 - INFO decorators.py:306 -- You could revert and ssh to master node: [source /home/jenkins/venv-nailgun-tests-2.9/bin/activate; dos.py revert-resume package_testing-centos-6_1-devops29 --snapshot-name error_prepare_release && ssh root@10.109.15.2]
2016-07-20 08:54:46,139 - INFO decorators.py:308 -- <<<<<****************************************************************************************************>>>>>
ERROR
Bootstrap 3 slave nodes ... SKIP: Failure in <function prepare_release at 0x7ff4efbe0938>
Deploy cluster in ha mode with 1 controller and Neutron GRE ... SKIP: Failure in <function prepare_release at 0x7ff4efbe0938>

======================================================================
ERROR: Prepare master node
----------------------------------------------------------------------
Traceback (most recent call last):
  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/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/helpers/decorators.py", line 80, in wrapper
    result = func(*args, **kwargs)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/tests/base_test_case.py", line 98, in prepare_release
    self.env.revert_snapshot("empty", skip_timesync=True)
  File "/home/jenkins/workspace/6.1.mos.deploy-rpm/fuel-qa/fuelweb_test/models/environment.py", line 282, in revert_snapshot
    self.d_env.revert(name)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/models/environment.py", line 191, in revert
    node.revert(name, destroy=False)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/devops/models/node.py", line 380, in revert
    self.driver.node_revert_snapshot(node=self, name=name)
  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/driver/libvirt/libvirt_driver.py", line 827, in node_revert_snapshot
    domain.revertToSnapshot(snapshot._snapshot, 0)
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/libvirt.py", line 1798, in revertToSnapshot
    if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)
libvirtError: XML error: Non-empty feature list specified without CPU model

More details here: http://osci-jenkins.srt.mirantis.net:8080/job/6.1.mos.deploy-rpm/1407/console