Adding a provenance event for EvaluateJsonPath when content is overwritten with selected expression.

nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/EvaluateJsonPath.java

@@ -227,6 +227,8 @@ public class EvaluateJsonPath extends AbstractJsonPathProcessor {
                             }
                         }
                     });
+                    processSession.getProvenanceReporter().modifyContent(flowFile,
+                            "Replaced content with result of expression " + jsonPathExp.getPath());
                     break;
             }
         }