Tempest test test_create_servers_on_same_host is failed

[Sofiia Andriichenko]

Detailed bug description:
9.1 snapshot #47

Configuration:
Settings:
Storage Backends - Ceph RBD for volumes (Cinder), Ceph RBD for ephemeral volumes (Nova), Ceph RBD for images (Glance), Ceph RadosGW for objects (Swift API)
Additional services - Install Sahara

In tab Settings->Compute check Nova quotas
In tab Settings->OpenStack Services check enable Install Ceilometer and Aodh
In tab Networks->Other check enable Neutron DVR

Nodes: controller, compute, Ceph, Telemetry - MongoDB

Steps to reproduce:
    1. Deploy ISO in configuration see (Detailed bug description)
    2. Navigate to controller node
    3. Install git (use apt-get install git)
    4. Clone script to deploy rally + tempest
       # git clone https://github.com/obutenko/mos-rally-verify.git
    5. Navigate to the https://github.com/obutenko/mos-rally-verify
    6. Execute necessary steps to deploy tempest
    7. Tun test in debug mode
        #rally --debug verify start --regex tempest.api.compute.admin.test_servers_on_multinodes.ServersOnMultiNodesTest.test_create_servers_on_same_host

Expected results:
Test is passed

Actual result:
Test is Failed
(see comments)

Reproducibility:
See attachment

Workaround:
---

Impact:
---

Description of the environment:
See (Detailed bug description)

Additional information:
Traceback (most recent call last):

  File "/home/rally/.rally/tempest/for-deployment-64051203-f222-4e8c-b56a-a34ebaefde33/tempest/api/compute/admin/test_servers_on_multinodes.py", line 50, in test_create_servers_on_same_host

    self.assertEqual(host01, host02)

  File "/usr/local/lib/python2.7/dist-packages/testtools/testcase.py", line 411, in assertEqual

    self.assertThat(observed, matcher, message)

  File "/usr/local/lib/python2.7/dist-packages/testtools/testcase.py", line 498, in assertThat

    raise mismatch_error

testtools.matchers._impl.MismatchError: u'node-6.test.domain.local' != u'node-4.test.domain.local'

Snapshot: http://www.ex.ua/957837273445