Use simple null check instead of Optional

Author: jorbaum

cloudfoundry-operations/src/main/java/org/cloudfoundry/operations/applications/DefaultApplications.java

@@ -559,7 +559,7 @@ public Flux<LogMessage> logs(LogsRequest request) {
 
     @Override
     public Flux<ApplicationLog> logs(ApplicationLogsRequest request) {
-        if (Optional.ofNullable(request.getRecent()).orElse(true)) {
+        if (request.getRecent() == null || request.getRecent()) {
             return Mono.zip(this.cloudFoundryClient, this.spaceId)
                     .flatMap(
                             function(