Polish test method name to reflect its expectation

Closes gh-19186

spring-boot-samples/spring-boot-sample-test/src/test/java/sample/test/web/UserVehicleControllerTests.java

@@ -93,7 +93,7 @@ public class UserVehicleControllerTests {
 	}
 
 	@Test(expected = NoSuchBeanDefinitionException.class)
-	public void welcomeCommandLineRunnerShouldBeAvailable() {
+	public void welcomeCommandLineRunnerShouldNotBeAvailable() {
 		// Since we're a @WebMvcTest WelcomeCommandLineRunner should not be available.
 		this.applicationContext.getBean(WelcomeCommandLineRunner.class);
 	}