Deletes the jclouds-created node

deleteNode.java

      System.out.println("ENTER to delete node");
      s.nextLine();

      try {
         Set<? extends NodeMetadata> servers = compute.destroyNodesMatching(inGroup("jclouds-workshop"));

         for (NodeMetadata nodeMetadata: servers) {
            System.out.println("  " + nodeMetadata);
         }
      }
      catch (Throwable e) {
         e.printStackTrace();
      }