action plugin net_config will now remove any private result key

This update will now remove any keys from results that are created using
the private names.  Private names are identified as double underscore (__)
on either side of the key name

lib/ansible/plugins/action/net_config.py

@@ -20,6 +20,7 @@ from __future__ import (absolute_import, division, print_function)
 __metaclass__ = type
 
 import os
+import re
 import time
 import glob
 import urlparse
@@ -27,6 +28,8 @@ import urlparse
 from ansible.plugins.action import ActionBase
 from ansible.utils.unicode import to_unicode
 
+PRIVATE_KEYS_RE = re.compile('__.+__')
+
 class ActionModule(ActionBase):
 
     TRANSFERS_FILES = False
@@ -41,16 +44,24 @@ class ActionModule(ActionBase):
             except ValueError as exc:
                 return dict(failed=True, msg=exc.message)
 
-        result.update(self._execute_module(module_name=self._task.action,
+        action = self._task.action
+
+        result.update(self._execute_module(module_name=action,
             module_args=self._task.args, task_vars=task_vars))
 
-        if self._task.args.get('backup_config') and result.get('__backup__'):
+        if self._task.args.get('backup') and result.get('__backup__'):
             # User requested backup and no error occurred in module.
             # NOTE: If there is a parameter error, _backup key may not be in results.
-            self._write_backup(task_vars['inventory_hostname'], result['__backup__'])
+            filepath = self._write_backup(task_vars['inventory_hostname'],
+                                          result['__backup__'])
+            result['backup_path'] = filepath
 
-        if '__backup__' in result:
-            del result['__backup__']
+
+        # strip out any keys that have two leading and two trailing
+        # underscore characters
+        for key in result.keys():
+            if PRIVATE_KEYS_RE.match(key):
+                del result[key]
 
         return result
 
@@ -69,6 +80,7 @@ class ActionModule(ActionBase):
         tstamp = time.strftime("%Y-%m-%d@%H:%M:%S", time.localtime(time.time()))
         filename = '%s/%s_config.%s' % (backup_path, host, tstamp)
         open(filename, 'w').write(contents)
+        return filename
 
     def _handle_template(self):
         src = self._task.args.get('src')