using static test port (#12896)

Co-authored-by: s9m33r <no-reply>

spring-reactive-modules/spring-reactive-exceptions/src/main/resources/application.yaml

@@ -1,3 +1,5 @@
 spring:
   codec:
     max-in-memory-size: 500KB
+
+host: http://localhost:${server.port}

spring-reactive-modules/spring-reactive-exceptions/src/test/java/com/baeldung/spring/reactive/springreactiveexceptions/SpringReactiveExceptionsApplicationIntegrationTest.java

@@ -12,7 +12,7 @@ import org.springframework.web.reactive.function.BodyInserters;
 
 import java.io.IOException;
 
-@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT, properties = "server.port=60291")
 class SpringReactiveExceptionsApplicationIntegrationTest {
 	@Autowired
 	private WebTestClient webTestClient;