Async test cases added and format code

tracer-sofa-boot-starter/src/test/java/com/alipay/sofa/tracer/boot/base/controller/SampleRestController.java

@@ -35,11 +35,11 @@
 @RestController
 public class SampleRestController {
 
-    public static String ASYNC_RESP = "Hello World!";
+    public static String        ASYNC_RESP = "Hello World!";
 
-    private static final String template = "Hello, %s!";
+    private static final String template   = "Hello, %s!";
 
-    private final AtomicLong    counter  = new AtomicLong();
+    private final AtomicLong    counter    = new AtomicLong();
 
     @RequestMapping("/greeting")
     public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {

tracer-sofa-boot-starter/src/test/java/com/alipay/sofa/tracer/boot/springmvc/SpringMvcAsyncTest.java

@@ -42,7 +42,7 @@
  * @author yangguanchao
  * @since 2018/08/31
  */
-@ActiveProfiles("json")
+@ActiveProfiles("async")
 public class SpringMvcAsyncTest extends AbstractTestBase {
 
     @Test

tracer-sofa-boot-starter/src/test/resources/application-async.properties

@@ -0,0 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+spring.application.name=SpringMvcAsyncServlet
+
+#default 60s and now reset to 1
+com.alipay.sofa.tracer.statLogInterval=1