quiet down ssh-key related UserWarning's when running smoke tests

[Dan Prince]

When running the Nova smoketests (for the EC2 API) you always get the following warnings:

    test_000_setUp /usr/lib/python2.7/site-packages/paramiko/client.py:95: UserWarning: Unknown ssh-rsa host key for 192.168.0.7: adb1c2f1fe461a35cd01283eac03d6fb

----

Paramiko supports an AutoAddPolicy as well which if we use should quiet things down a bit.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/14236

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/14236
Committed: http://github.com/openstack/nova/commit/ea3f31b7e9e5afb6ca7905809be520800764841d
Submitter: Jenkins
Branch: master

commit ea3f31b7e9e5afb6ca7905809be520800764841d
Author: Dan Prince <email address hidden>
Date: Tue Oct 9 13:28:11 2012 -0400

    Use paramiko.AutoAddPolicy for the smoketests.

    Updates the Nova smoketests so that we use Paramiko's auto
    add ssh key policy. This should help quiet down warnings like
    this which we previously got when running the EC2 smoketests
    with Nova:

    /usr/lib/python2.7/site-packages/paramiko/client.py:95: UserWarning:
    Unknown ssh-rsa host key for 172.20.0.3:
    adb1c2f1fe461a35cd01283eac03d6fb

    Fixes LP Bug #1064550.

    Change-Id: I1611a3f6b54563b6a1d64c4f8e193a636ccb1c69