Update Mockito, JUnit and use MockitoExtensions in itests (#9702)

* Updates Mockito to 3.7.0
* Updates JUnit to 5.7.0
* Use MockitoExtensions where possible

Signed-off-by: Wouter Born <github@maindrain.net>

itests/org.openhab.binding.nest.tests/src/main/java/org/openhab/binding/nest/handler/NestBridgeHandlerTest.java

@@ -16,15 +16,15 @@ import static org.hamcrest.CoreMatchers.*;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.*;
-import static org.mockito.MockitoAnnotations.openMocks;
 
 import javax.ws.rs.client.ClientBuilder;
 
-import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
 import org.openhab.binding.nest.internal.config.NestBridgeConfiguration;
 import org.openhab.binding.nest.internal.handler.NestBridgeHandler;
 import org.openhab.binding.nest.internal.handler.NestRedirectUrlSupplier;
@@ -42,12 +42,11 @@ import org.osgi.service.jaxrs.client.SseEventSourceFactory;
  *
  * @author David Bennett - Initial contribution
  */
+@ExtendWith(MockitoExtension.class)
 public class NestBridgeHandlerTest {
 
     private ThingHandler handler;
 
-    private AutoCloseable mocksCloseable;
-
     private @Mock Bridge bridge;
     private @Mock ThingHandlerCallback callback;
     private @Mock ClientBuilder clientBuilder;
@@ -57,16 +56,10 @@ public class NestBridgeHandlerTest {
 
     @BeforeEach
     public void beforeEach() {
-        mocksCloseable = openMocks(this);
         handler = new NestTestBridgeHandler(bridge, clientBuilder, eventSourceFactory, "http://localhost");
         handler.setCallback(callback);
     }
 
-    @AfterEach
-    public void afterEach() throws Exception {
-        mocksCloseable.close();
-    }
-
     @SuppressWarnings("null")
     @Test
     public void initializeShouldCallTheCallback() {