Update bare exceptions to specify Exception.

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

lib/ansible/modules/cloud/amazon/aws_kms.py

@@ -201,7 +201,7 @@ def do_grant(kms, keyarn, role_arn, granttypes, mode='grant', dry_run=True, clea
             kms.put_key_policy(KeyId=keyarn, PolicyName='default', Policy=policy_json_string)
             # returns nothing, so we have to just assume it didn't throw
             ret['changed'] = True
-    except:
+    except Exception:
         raise
 
     ret['changes_needed'] = changes_needed