[3.3] Destroy application model after MetricsSupportTest (#15481)

* Destroy application model after MetricsSupportTest

* Destroy application model after MethodMetricTest

Author: zrlw

dubbo-metrics/dubbo-metrics-api/src/test/java/org/apache/dubbo/metrics/MetricsSupportTest.java

@@ -29,13 +29,19 @@
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicLong;
 
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
 import static org.apache.dubbo.metrics.model.key.MetricsKey.METRIC_REQUESTS;
 
 public class MetricsSupportTest {
 
+    @AfterEach
+    public void destroy() {
+        ApplicationModel.defaultModel().destroy();
+    }
+
     @Test
     void testFillZero() {
         ApplicationModel applicationModel = FrameworkModel.defaultModel().newApplication();

dubbo-metrics/dubbo-metrics-default/src/test/java/org/apache/dubbo/metrics/metrics/model/MethodMetricTest.java

@@ -27,6 +27,7 @@
 
 import java.util.Map;
 
+import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -69,6 +70,11 @@ public static void setup() {
                 .setUrl(URL.valueOf("test://test:11/test?accesslog=true&group=dubbo&version=1.1&side=consumer"));
     }
 
+    @AfterAll
+    public static void destroy() {
+        ApplicationModel.defaultModel().destroy();
+    }
+
     @Test
     void test() {
         MethodMetric metric =