Updated the multi field integration test

Author: normanj-bitquill

docs/user/ppl/cmd/fillnull.rst

@@ -51,16 +51,16 @@ The example show to replace null values for email with "<not found>" and null va
 
 PPL query::
 
-    os> source=accounts | fields email, host | fillnull using email = '<not found>', host = '<no host>' ;
+    os> source=accounts | fields email, employer | fillnull using email = '<not found>', employer = '<no employer>' ;
     fetched rows / total rows = 4/4
-    +-----------------------+------------+
-    | email                 | host       |
-    |-----------------------+------------|
-    | amberduke@pyrami.com  | pyrami.com |
-    | hattiebond@netagy.com | netagy.com |
-    | <not found>           |            |
-    | daleadams@boink.com   | boink.com  |
-    +-----------------------+------------+
+    +-----------------------+---------------+
+    | email                 | employer      |
+    |-----------------------+---------------|
+    | amberduke@pyrami.com  | Pyrami        |
+    | hattiebond@netagy.com | Netagy        |
+    | <not found>           | Quility       |
+    | daleadams@boink.com   | <no employer> |
+    +-----------------------+---------------+
 
 Limitation
 ==========

integ-test/src/test/resources/expectedOutput/ppl/explain_fillnull_push.json

@@ -6,11 +6,11 @@
     },
     "children": [
       {
-        "name":"EvalOperator",
+        "name": "EvalOperator",
         "description": {
           "expressions": {
             "balance": "ifnull(balance, -1)",
-            "age":"ifnull(age, -1)"
+            "age": "ifnull(age, -1)"
           }
         },
         "children": [
@@ -23,7 +23,7 @@
               {
                 "name": "OpenSearchIndexScan",
                 "description": {
-                  "request": "OpenSearchQueryRequest(indexName=opensearch-sql_test_index_account, sourceBuilder={\"from\":0,\"size\":10000,\"timeout\":\"1m\",\"_source\":{\"includes\":[\"balance\",\"age\"],\"excludes\":[]}}, needClean=true, searchDone=false, pitId=null, cursorKeepAlive=null, searchAfter=null, searchResponse=null)"
+                  "request": "OpenSearchQueryRequest(indexName=opensearch-sql_test_index_account, sourceBuilder={\"from\":0,\"size\":10000,\"timeout\":\"1m\",\"_source\":{\"includes\":[\"age\",\"balance\"],\"excludes\":[]}}, needClean=true, searchDone=false, pitId=null, cursorKeepAlive=null, searchAfter=null, searchResponse=null)"
                 },
                 "children": []
               }