address comments

pulsar-broker/src/test/java/org/apache/pulsar/broker/auth/MockedPulsarServiceBaseTest.java

@@ -712,6 +712,7 @@ protected void sleepSeconds(int seconds){
         try {
             Thread.currentThread().sleep(1000 * seconds);
         } catch (InterruptedException e) {
+            log.warn("This thread has been interrupted", e);
             Thread.currentThread().interrupt();
         }
     }