ROCKETMQ-3 Clean up the unit test code of rocketmq-client

rocketmq-client/src/test/java/com/alibaba/rocketmq/client/ValidatorsTest.java

@@ -17,6 +17,7 @@
 
 package com.alibaba.rocketmq.client;
 
+import com.alibaba.rocketmq.client.exception.MQClientException;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -24,16 +25,11 @@ import org.junit.Test;
 public class ValidatorsTest {
 
     @Test
-    public void topicValidatorTest() {
-        try {
+    public void topicValidatorTest() throws MQClientException {
         Validators.checkTopic("Hello");
         Validators.checkTopic("%RETRY%Hello");
         Validators.checkTopic("_%RETRY%Hello");
         Validators.checkTopic("-%RETRY%Hello");
         Validators.checkTopic("223-%RETRY%Hello");
-        } catch (Exception e) {
-            e.printStackTrace();
-            Assert.assertTrue(false);
-        }
     }
 }