@GetMapping("/apps/{appName}")
	public Application getApplication(@PathVariable String appName, @RequestHeader HttpHeaders headers) {
		// Used to verify that RequestConfig customizer has taken effect
		if (appName.equals("upgrade") && !headers.containsHeader("upgrade")) {
			throw new RuntimeException("No upgrade header found");
		}
		return new Application();
	}
Simulates Eureka Server own's serialization.
@return converter
spring-cloud-netflix-eureka-client/src/test/java/org/springframework/cloud/netflix/eureka/http/EurekaServerMockApplication.java