fix star import

Author: htynkn

dubbo-rpc/dubbo-rpc-memcached/src/test/java/com/alibaba/dubbo/rpc/protocol/memcached/MemcachedProtocolTest.java

@@ -16,8 +16,6 @@
  */
 package com.alibaba.dubbo.rpc.protocol.memcached;
 
-import static org.junit.Assert.*;
-
 public class MemcachedProtocolTest {
 
 }

dubbo-rpc/dubbo-rpc-redis/src/test/java/com/alibaba/dubbo/rpc/protocol/redis/RedisProtocolTest.java

@@ -30,7 +30,7 @@
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.nullValue;
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertThat;
 
 public class RedisProtocolTest {
     private Protocol protocol = ExtensionLoader.getExtensionLoader(Protocol.class).getAdaptiveExtension();

dubbo-rpc/dubbo-rpc-rest/src/test/java/com/alibaba/dubbo/rpc/protocol/rest/RestProtocolTest.java

@@ -20,7 +20,14 @@
 import com.alibaba.dubbo.common.URL;
 import com.alibaba.dubbo.common.extension.ExtensionLoader;
 import com.alibaba.dubbo.common.utils.NetUtils;
-import com.alibaba.dubbo.rpc.*;
+import com.alibaba.dubbo.rpc.Exporter;
+import com.alibaba.dubbo.rpc.Protocol;
+import com.alibaba.dubbo.rpc.ProxyFactory;
+import com.alibaba.dubbo.rpc.Result;
+import com.alibaba.dubbo.rpc.RpcContext;
+import com.alibaba.dubbo.rpc.RpcException;
+import com.alibaba.dubbo.rpc.RpcInvocation;
+import com.alibaba.dubbo.rpc.ServiceClassHolder;
 import org.hamcrest.CoreMatchers;
 import org.junit.After;
 import org.junit.Test;

dubbo-rpc/dubbo-rpc-rest/src/test/java/com/alibaba/dubbo/rpc/protocol/rest/RpcExceptionMapperTest.java

@@ -26,7 +26,9 @@
 import javax.validation.ConstraintViolationException;
 import javax.ws.rs.core.Response;
 
-import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.nullValue;
 import static org.junit.Assert.assertThat;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;