The reindex body is now required, which changes the exception thrown by the REST test

modules/reindex/src/test/resources/rest-api-spec/test/reindex/20_validation.yaml

@@ -1,7 +1,7 @@
 ---
 "no body fails":
   - do:
-      catch: /body required/
+      catch: param
       reindex: {}
 
 ---