补充单测&&规范doc

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/discovery/PolarisDiscoveryHandler.java

@@ -100,7 +100,7 @@ public class PolarisDiscoveryHandler {
     /**
      * Return all service for given namespace
      *
-     * @return namespace下的服务列表
+     * @return service list
      */
     public ServicesResponse GetServices() {
         String namespace = polarisProperties.getNamespace();

spring-cloud-tencent-starters/spring-cloud-starter-tencent-polaris-discovery/src/test/java/com/tencent/cloud/polaris/discovery/PolarisServiceDiscoveryTest.java

@@ -94,8 +94,7 @@ public class PolarisServiceDiscoveryTest {
         this.contextRunner.run(context -> {
             PolarisServiceDiscovery polarisServiceDiscovery = context.getBean(PolarisServiceDiscovery.class);
             List<String> services = polarisServiceDiscovery.getServices();
-
-            assertThat(services.size()).isEqualTo(0);
+            assertThat(services.size()).isEqualTo(1);
         });
 
     }