Fix test failing due dirty Spring context

I don't fully understand the fix but forcing SpringBootTest runner to
not reuse the context solves the issue with SpringDocApp1451Test.java
always failing with the following.

"WebClientRequestException: Connection refused: localhost/127.0.0.1:9086"

BUGFIX

Author: Björn

springdoc-openapi-webflux-core/src/test/java/test/org/springdoc/api/app145/SpringDocApp1451Test.java

@@ -19,6 +19,7 @@
 package test.org.springdoc.api.app145;
 
 import org.junit.jupiter.api.Test;
+import org.springframework.test.annotation.DirtiesContext;
 import test.org.springdoc.api.AbstractSpringDocActuatorTest;
 
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -32,6 +33,7 @@
 import static org.skyscreamer.jsonassert.JSONAssert.assertEquals;
 
 
+@DirtiesContext
 @SpringBootTest(webEnvironment = WebEnvironment.DEFINED_PORT,
 		properties = { "management.endpoints.web.exposure.include=*",
 				"server.port=55594",