added inventory_hostname_short varible

lib/ansible/inventory/__init__.py

@@ -163,9 +163,6 @@ class Inventory(object):
             )
             (out, err) = cmd.communicate()
             results = utils.parse_json(out)
-            results['inventory_hostname'] = hostname
-            groups = [ g.name for g in host.get_groups() if g.name != 'all' ]
-            results['group_names'] = sorted(groups)
             return results
 
         host = self.get_host(hostname)

lib/ansible/inventory/host.py

@@ -59,6 +59,7 @@ class Host(object):
             results.update(group.get_variables())
         results.update(self.vars)
         results['inventory_hostname'] = self.name
+        results['inventory_hostname_short'] = self.name.split('.')[0]
         groups = self.get_groups()
         results['group_names'] = sorted([ g.name for g in groups if g.name != 'all'])
         return results