HADOOP-19429. Fix CheckStyle.

Author: slfan1989

hadoop-tools/hadoop-dynamometer/hadoop-dynamometer-infra/src/test/java/org/apache/hadoop/tools/dynamometer/TestDynamometerInfra.java

@@ -71,7 +71,13 @@
 import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacitySchedulerConfiguration;
 import org.apache.hadoop.yarn.util.resource.DominantResourceCalculator;
 import org.apache.hadoop.yarn.util.resource.ResourceCalculator;
-import org.junit.jupiter.api.*;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.Timeout;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;