YARN-11358. Fix CheckStyle.

Author: slfan1989

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/test/java/org/apache/hadoop/yarn/server/router/webapp/TestFederationInterceptorRESTRetry.java

@@ -26,11 +26,9 @@
 import javax.ws.rs.core.Response;
 
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.test.LambdaTestUtils;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnException;
-import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.server.federation.policies.FederationPolicyUtils;
 import org.apache.hadoop.yarn.server.federation.policies.manager.UniformBroadcastPolicyManager;
 import org.apache.hadoop.yarn.server.federation.store.impl.MemoryFederationStateStore;
@@ -43,6 +41,7 @@
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.ClusterMetricsInfo;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NewApplication;
 import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodeInfo;
+import org.apache.hadoop.yarn.server.resourcemanager.webapp.dao.NodesInfo;
 import org.apache.hadoop.yarn.server.router.clientrm.PassThroughClientRequestInterceptor;
 import org.apache.hadoop.yarn.server.router.clientrm.TestableFederationClientInterceptor;
 import org.apache.hadoop.yarn.webapp.NotFoundException;