Various neutron tests fail with SSH Timeout EOFError

[Terry Wilson]

check-tempest-dsvm-neutron-2 failing with:

    2014-06-19 22:16:03.198 | 2014-06-19 22:07:37,376 Failed to establish authenticated ssh connection to cirros@172.24.4.71 ([Errno 111] Connection refused). Number attempts: 4. Retry after 5 seconds.
    2014-06-19 22:16:03.198 | 2014-06-19 22:07:42,999 Public network connectivity check failed
    ...
    2014-06-19 22:16:03.202 | 2014-06-19 22:07:42.999 19995 TRACE tempest.scenario.manager t.start_client()
    2014-06-19 22:16:03.203 | 2014-06-19 22:07:42.999 19995 TRACE tempest.scenario.manager File "/usr/local/lib/python2.7/dist-packages/paramiko/transport.py", line 346, in start_client
    2014-06-19 22:16:03.203 | 2014-06-19 22:07:42.999 19995 TRACE tempest.scenario.manager raise e
    2014-06-19 22:16:03.203 | 2014-06-19 22:07:42.999 19995 TRACE tempest.scenario.manager EOFError

http://logs.openstack.org/39/101039/3/check/check-tempest-dsvm-neutron-2/c035243/console.html

http://paste.openstack.org/show/84598/

[Eugene Nikanorov (enikanorov)]

We have an umbrella bug for such failures: https://bugs.launchpad.net/tempest/+bug/1253896
Particularly, this issue is caused by instance resize/reboot/pause/resume