Merge pull request #3270 from saito-hideki/issue/tower_3344

Add action to output login failure event to logfile

Reviewed-by: Ryan Petrello
             https://github.com/ryanpetrello

awx/api/generics.py

@@ -100,6 +100,8 @@ class LoggedLoginView(auth_views.LoginView):
 
             return ret
         else:
+            if 'username' in self.request.POST:
+                logger.warn(smart_text(u"Login failed for user {}".format(self.request.POST.get('username'))))
             ret.status_code = 401
             return ret