Revert "PR Feedback"

This reverts commit 990e24c.

Author: joegallo

modules/ingest-common/src/main/java/org/elasticsearch/ingest/common/JsonProcessor.java

@@ -188,12 +188,11 @@ public static void recursiveMerge(Map<String, Object> target, Map<String, Object
 
     @Override
     public IngestDocument execute(IngestDocument document) throws Exception {
-        Object fieldValue = document.getFieldValue(field, Object.class);
         if (addToRoot) {
-            Object value = apply(fieldValue, allowDuplicateKeys, strictJsonParsing);
+            Object value = apply(document.getFieldValue(field, Object.class), allowDuplicateKeys, strictJsonParsing);
             mergeParsedJson(document.getSourceAndMetadata(), value, addToRootConflictStrategy);
         } else {
-            document.setFieldValue(targetField, apply(fieldValue, allowDuplicateKeys, strictJsonParsing));
+            document.setFieldValue(targetField, apply(document.getFieldValue(field, Object.class), allowDuplicateKeys, strictJsonParsing));
         }
         return document;
     }