Update bare exceptions to specify Exception.

This will keep us from accidentally catching program-exiting exceptions
like KeyboardInterupt and SystemExit.

lib/ansible/modules/notification/mail.py

@@ -275,7 +275,7 @@ def main():
                 if secure == 'always':
                     module.fail_json(rc=1, msg='Unable to start an encrypted session to %s:%s: %s' %
                                                (host, port, to_native(e)), exception=traceback.format_exc())
-            except:
+            except Exception:
                 pass
 
         if not secure_state: