fix ut and style

Author: niuyulin

hbase-server/src/main/java/org/apache/hadoop/hbase/compactionserver/CSRpcServices.java

@@ -19,7 +19,6 @@
 
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
@@ -42,7 +41,6 @@
 import org.apache.hadoop.hbase.shaded.protobuf.generated.CompactionProtos;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.CompactionProtos.CompactResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.CompactionProtos.CompactionService;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos;
 
 @InterfaceAudience.Private
 public class CSRpcServices extends AbstractRpcServices

hbase-server/src/test/java/org/apache/hadoop/hbase/compactionserver/TestRegionFavoredNodesWhenCompactOffload.java

@@ -16,6 +16,11 @@
  * limitations under the License.
  */
 package org.apache.hadoop.hbase.compactionserver;
+
+import java.net.InetSocketAddress;
+
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.StartMiniClusterOption;
 import org.apache.hadoop.hbase.client.TableDescriptor;
 import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
@@ -26,17 +31,19 @@
 import org.apache.hadoop.hbase.util.Bytes;
 import org.junit.Assume;
 import org.junit.BeforeClass;
+import org.junit.ClassRule;
 import org.junit.Test;
 import org.junit.experimental.categories.Category;
-import org.apache.hadoop.hbase.HBaseTestingUtility;
-
-import java.net.InetSocketAddress;
 
 @Category({ CompactionServerTests.class, MediumTests.class })
 public class TestRegionFavoredNodesWhenCompactOffload extends TestRegionFavoredNodes {
   private static HCompactionServer COMPACTION_SERVER;
   private static final int FLUSHES = 10;
 
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestRegionFavoredNodesWhenCompactOffload.class);
+
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     try {