Create SpringBootAdminClientAutoConfiguration only when URL is set

spring-boot-admin-example/src/main/resources/application.properties

@@ -2,6 +2,6 @@ spring.resources.cachePeriod=3600
 server.port=8080
 info.id=@pom.artifactId@
 info.version=@pom.version@
-spring.boot.admin.url=http://localhost:8080
 logging.file=/tmp/log.log
 spring.application.name=spring-boot-admin-example
+spring.boot.admin.url=http://localhost:8080

spring-boot-starter-admin-client/src/main/java/de/codecentric/boot/admin/config/SpringBootAdminClientAutoConfiguration.java

@@ -30,13 +30,13 @@ import de.codecentric.boot.admin.web.SimpleCORSFilter;
  * application is registered at the spring-boot-admin application. If not, it registers itself.
  */
 @Configuration
+@ConditionalOnProperty("spring.boot.admin.url")
 public class SpringBootAdminClientAutoConfiguration {
 
 	/**
 	 * Task that registers the application at the spring-boot-admin application.
 	 */
 	@Bean
-	@ConditionalOnProperty("spring.boot.admin.url")
 	public Runnable registrator() {
 		return new SpringBootAdminRegistratorTask();
 	}