title: Validation Error: no updates are to be performed in Cloudformation returns error
body: <p>When I execute in my CI aws-cli to update CloudFormation stack, I get the following error message:</p>
  
  <pre><code>An error occurred (ValidationError) when calling the UpdateStack operation: No updates are to be performed.
  </code></pre>
  
  <p>No updates are seen like error hence the CI fails. Any idea how to capture this error?</p>