Remove obsolete "test" prefix from test method names

Although this commit also changes the visibility of some test methods
to package-private, the remainder of that task will be addressed in
conjunction with gh-36496.

Closes gh-36495

spring-websocket/src/test/java/org/springframework/web/socket/config/MessageBrokerBeanDefinitionParserTests.java

@@ -384,7 +384,7 @@ class MessageBrokerBeanDefinitionParserTests {
 	}
 
 	@Test  // SPR-11623
-	public void customChannelsWithDefaultExecutor() {
+	void customChannelsWithDefaultExecutor() {
 		loadBeanDefinitions("websocket-config-broker-customchannels-default-executor.xml");
 
 		testExecutor("clientInboundChannel", Runtime.getRuntime().availableProcessors() * 2, Integer.MAX_VALUE, 60);

spring-websocket/src/test/java/org/springframework/web/socket/handler/ConcurrentWebSocketSessionDecoratorTests.java

@@ -129,7 +129,7 @@ class ConcurrentWebSocketSessionDecoratorTests {
 	}
 
 	@Test // SPR-17140
-	public void overflowStrategyDrop() throws IOException, InterruptedException {
+	void overflowStrategyDrop() throws IOException, InterruptedException {
 
 		BlockingWebSocketSession session = new BlockingWebSocketSession();
 		session.setId("123");

spring-websocket/src/test/java/org/springframework/web/socket/messaging/SubProtocolWebSocketHandlerTests.java

@@ -157,7 +157,7 @@ public class SubProtocolWebSocketHandlerTests {
 
 	@Test
 	@SuppressWarnings("unchecked")
-	public void checkSession() throws Exception {
+	void checkSession() throws Exception {
 		TestWebSocketSession session1 = new TestWebSocketSession("id1");
 		TestWebSocketSession session2 = new TestWebSocketSession("id2");
 		session1.setOpen(true);

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/TransportTypeTests.java

@@ -26,7 +26,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 class TransportTypeTests {
 
 	@Test
-	void testFromValue() {
+	void fromValue() {
 		assertThat(TransportType.fromValue("websocket")).isEqualTo(TransportType.WEBSOCKET);
 		assertThat(TransportType.fromValue("xhr")).isEqualTo(TransportType.XHR);
 		assertThat(TransportType.fromValue("xhr_send")).isEqualTo(TransportType.XHR_SEND);