make it output number of pkgs neeed to be updated per host

scripts/needs-updates

@@ -24,9 +24,10 @@ def main(args):
     parser.add_option('--host', dest='hostlist', action='append',
         help="hosts to contact, defaults to all in your inventory", default=[])
     options, args = parser.parse_args(args)
-    options.module_name = 'shell'  
-    options.module_args = 'yum check-update > /dev/null'
-           
+    options.module_name = 'yum' 
+    options.module_args = 'list=updates'
+        
+                   
     # no hosts specified? Run against all of them
     if not options.hostlist:
         options.pattern = 'all'
@@ -53,11 +54,10 @@ def main(args):
     needsupdate = []
     results = runner.run()
     for (host,d) in results['contacted'].items():
-         answer = d.get('rc', '0')
-         if answer == 100:
-             needsupdate.append(host)
-         elif answer == 0:
-             pass
+         answer = d.get('results', [])
+         if answer:
+             needsupdate.append('%s : %s' % (host, len(answer)))
+                
          else:
              if d.get('failed', False):
                  err = d.get('stderr', '').strip()