Correct "changed" to work with the latest ansible

This commit adds a check for "changed" in the return from the copy
module. If the value is not possitive `rc['changed']` will be set
with the constant "changed" from within the action plugin.

Change-Id: Id65e6e57d174c4c25d99836b09ad049302d4e42c
Signed-off-by: cloudnull <kevin@cloudnull.com>

action/config_template.py

@@ -831,8 +831,10 @@ class ActionModule(ActionBase):
             module_args=new_module_args,
             task_vars=task_vars
         )
+        copy_changed = rc.get('changed')
+        if not copy_changed:
+            rc['changed'] = changed
 
-        rc['changed'] = changed
         if self._play_context.diff:
             rc['diff'] = []
             rc['diff'].append(