Edit test script template

edit a script so that a zero return code indicates
a successfully deployed openstack environment.

previously, it blocked waiting for user input for the
connection.

these changes are getting this script ready to run CI.

templates/test_nova.sh.erb

@@ -72,5 +72,6 @@ nova --no-cache add-floating-ip $instance_name $floating_ip
 # Wait  and then try to SSH to the node, leveraging the private key
 # we generated earlier.
 sleep <%= sleep_time %>
-ssh $login_user@$floating_ip -i /tmp/id_rsa
+ssh $login_user@$floating_ip -i /tmp/id_rsa -o StrictHostKeyChecking=no hostname
 <% end -%>
+exit 0