title: OpenSUSE snapshots not allowing ssh
body: <p>I can't seem to ssh into any instances that are created from a snapshot of an openSUSE instance that's created within Google Cloud (ie: not from a snapshot created locally and then uploaded). I've tested this with three different openSUSE instances, 2 that I had been working on and one that I created only to test this on, and none have been able to produce snapshots that produce instances that allow ssh. To be clear, the instances created from the snapshots start up perfectly fine and show no issues from the console, but neither the console's built in ssh nor any other ssh client (putty, mobaxterm) gets anything more than a time out error. I have successfully created instances from both a Windows and Debian snapshots that I have created myself, so I'm confident it's an issue with the specific OS.</p>
  
  <p>Steps to reproduce:</p>
  
  <ol>
  <li>Create an instance based off of the openSUSE image</li>
  <li>Create a snapshot based off of the instance you just created</li>
  <li>Create an instance based off of the snapshot you just created</li>
  <li>Attempt, and fail, to connect to the instance via ssh</li>
  </ol>
  
  <p>Any help with this would be much appreciated, and thank you very much in advance.</p>