title: unable to delete security groups from amazon aws
body: <p>I have created the three security groups for the testing purpose on <code>amazon aws</code>. Now I want to delete them. But, every time I try to delete them it gives me the error:
  Group XXXXXXX:<code>testcluster</code> is used by groups: XXXXXXXX:<code>testcluster-master</code> XXXXXXX:<code>testcluster-zookeeper</code></p>
  
  <p>Also, there is no option to delete multiple groups. So, could you please tell me how to delete them?</p>