[bs-130] Prevent double registration

* A simple check to see if it is already registered
fixed the original problem
* Also removed the need to have @ConfigurationProperties
on a bean class (unless you want to specify the target name
etc.)

[Fixes #50256421] [bs-130] When actuator app starts the
@ConfigurationProperties are registered with the bean
factory several times

spring-bootstrap-samples/spring-bootstrap-actuator-sample/src/main/resources/logging.properties

@@ -0,0 +1,6 @@
+handlers = java.util.logging.ConsoleHandler
+.level = INFO
+
+java.util.logging.ConsoleHandler.level = FINE
+sun.net.www.protocol.http.HttpURLConnection.level = ALL
+org.springframework.bootstrap.level = ALL

spring-bootstrap-samples/spring-bootstrap-actuator-sample/src/test/java/org/springframework/bootstrap/sample/service/ServiceBootstrapApplicationTests.java

@@ -50,7 +50,7 @@ public class ServiceBootstrapApplicationTests {
 										.run(ServiceBootstrapApplication.class);
 							}
 						});
-		context = future.get(10, TimeUnit.SECONDS);
+		context = future.get(30, TimeUnit.SECONDS);
 	}
 
 	@AfterClass