WIP need to check version

Author: davidkyle

x-pack/qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/TransformSurvivesUpgradeIT.java

@@ -9,6 +9,7 @@
 import org.apache.http.HttpHost;
 import org.apache.http.entity.ContentType;
 import org.apache.http.entity.StringEntity;
+import org.elasticsearch.Build;
 import org.elasticsearch.client.Request;
 import org.elasticsearch.client.Response;
 import org.elasticsearch.client.RestClient;
@@ -234,6 +235,7 @@ private void verifyContinuousTransformHandlesData(long expectedLastCheckpoint) t
     private void verifyUpgradeFailsIfMixedCluster() {
         // upgrade tests by design are also executed with the same version, this check must be skipped in this case, see gh#39102.
         if (isOriginalClusterCurrent()) {
+            Build.current().v
             return;
         }
         final Request upgradeTransformRequest = new Request("POST", getTransformEndpoint() + "_upgrade");