Adjust the versions for 'fields' in inner_hits.

Now that the change has been backported, the version can be updated to 7.10.

server/src/main/java/org/elasticsearch/index/query/InnerHitBuilder.java

@@ -181,7 +181,7 @@ public final class InnerHitBuilder implements Writeable, ToXContentObject {
         highlightBuilder = in.readOptionalWriteable(HighlightBuilder::new);
         this.innerCollapseBuilder = in.readOptionalWriteable(CollapseBuilder::new);
 
-        if (in.getVersion().onOrAfter(Version.CURRENT)) {
+        if (in.getVersion().onOrAfter(Version.V_7_10_0)) {
             if (in.readBoolean()) {
                 fetchFields = in.readList(FieldAndFormat::new);
             }
@@ -225,7 +225,7 @@ public final class InnerHitBuilder implements Writeable, ToXContentObject {
         out.writeOptionalWriteable(highlightBuilder);
         out.writeOptionalWriteable(innerCollapseBuilder);
 
-        if (out.getVersion().onOrAfter(Version.CURRENT)) {
+        if (out.getVersion().onOrAfter(Version.V_7_10_0)) {
             out.writeBoolean(fetchFields != null);
             if (fetchFields != null) {
                 out.writeList(fetchFields);

server/src/main/java/org/elasticsearch/search/aggregations/metrics/TopHitsAggregationBuilder.java

@@ -142,7 +142,7 @@ public class TopHitsAggregationBuilder extends AbstractAggregationBuilder<TopHit
         trackScores = in.readBoolean();
         version = in.readBoolean();
         seqNoAndPrimaryTerm = in.readBoolean();
-        if (in.getVersion().onOrAfter(Version.CURRENT)) {
+        if (in.getVersion().onOrAfter(Version.V_7_10_0)) {
             if (in.readBoolean()) {
                 fetchFields = in.readList(FieldAndFormat::new);
             }
@@ -175,7 +175,7 @@ public class TopHitsAggregationBuilder extends AbstractAggregationBuilder<TopHit
         out.writeBoolean(trackScores);
         out.writeBoolean(version);
         out.writeBoolean(seqNoAndPrimaryTerm);
-        if (out.getVersion().onOrAfter(Version.CURRENT)) {
+        if (out.getVersion().onOrAfter(Version.V_7_10_0)) {
             out.writeBoolean(fetchFields != null);
             if (fetchFields != null) {
                 out.writeList(fetchFields);