[TEST] increased logging

Original commit: elastic/x-pack-elasticsearch@6aeac48889

plugin/src/test/java/org/elasticsearch/xpack/ml/integration/MlDistributedFailureIT.java

@@ -53,6 +53,7 @@ public class MlDistributedFailureIT extends BaseMlIntegTestCase {
         });
     }
 
+    @TestLogging("org.elasticsearch.xpack.persistent:TRACE,org.elasticsearch.cluster.service:TRACE")
     public void testLoseDedicatedMasterNode() throws Exception {
         internalCluster().ensureAtMostNumDataNodes(0);
         logger.info("Starting dedicated master node...");