Use ForkJoinPool.commonPool-worker- for new prefix addition

Author: JeremyDahlgren

test/fixtures/hdfs-fixture/src/main/java/org/elasticsearch/test/fixtures/hdfs/HdfsClientThreadLeakFilter.java

@@ -35,6 +35,7 @@ public boolean reject(Thread t) {
             || t.getName().startsWith("SSL Certificates Store Monitor") // hadoop 3 brings that in
             || t.getName().startsWith("GcTimeMonitor") // hadoop 3
             || t.getName().startsWith("Command processor") // hadoop 3
-            || t.getName().startsWith("ForkJoinPool"); // hadoop 3
+            || t.getName().startsWith("ForkJoinPool-") // hadoop 3
+            || t.getName().startsWith("ForkJoinPool.commonPool-worker-"); // hadoop 3
     }
 }