Correct exclusion of test on JDK 11

plugins/repository-hdfs/build.gradle

@@ -228,7 +228,7 @@ if (rootProject.ext.compilerJavaVersion.isJava11()) {
     ].join(',')
   }
 }
-if (rootProject.ext.runtimeJavaVersion.isJava11()) {
+if (rootProject.ext.compilerJavaVersion.isJava11()) {
   // TODO remove when: https://github.com/elastic/elasticsearch/issues/31498
   integTestHa.enabled = false
 }