fix backwards compatible tests

Signed-off-by: Dharin Shah <8616130+Dharin-shah@users.noreply.github.com>

server/src/main/java/org/opensearch/search/builder/SearchSourceBuilder.java

@@ -176,7 +176,7 @@ public static HighlightBuilder highlight() {
 
     private boolean trackScores = false;
 
-    private Boolean includeNamedQueriesScore = false;
+    private Boolean includeNamedQueriesScore;
 
     private Integer trackTotalHitsUpTo;
 
@@ -262,7 +262,6 @@ public SearchSourceBuilder(StreamInput in) throws IOException {
         terminateAfter = in.readVInt();
         timeout = in.readOptionalTimeValue();
         trackScores = in.readBoolean();
-        includeNamedQueriesScore = in.readOptionalBoolean();
         version = in.readOptionalBoolean();
         seqNoAndPrimaryTerm = in.readOptionalBoolean();
         extBuilders = in.readNamedWriteableList(SearchExtBuilder.class);
@@ -280,6 +279,9 @@ public SearchSourceBuilder(StreamInput in) throws IOException {
                 searchPipelineSource = in.readMap();
             }
         }
+        if (in.getVersion().onOrAfter(Version.V_3_0_0)) {
+            includeNamedQueriesScore = in.readOptionalBoolean();
+        }
     }
 
     @Override
@@ -326,7 +328,6 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVInt(terminateAfter);
         out.writeOptionalTimeValue(timeout);
         out.writeBoolean(trackScores);
-        out.writeOptionalBoolean(includeNamedQueriesScore);
         out.writeOptionalBoolean(version);
         out.writeOptionalBoolean(seqNoAndPrimaryTerm);
         out.writeNamedWriteableList(extBuilders);
@@ -346,6 +347,9 @@ public void writeTo(StreamOutput out) throws IOException {
                 out.writeMap(searchPipelineSource);
             }
         }
+        if (out.getVersion().onOrAfter(Version.V_3_0_0)) {
+            out.writeOptionalBoolean(includeNamedQueriesScore);
+        }
     }
 
     /**