Add more logging around unknown job tags

src/main/java/org/datadog/jenkins/plugins/datadog/publishers/DatadogQueuePublisher.java

@@ -147,6 +147,7 @@ private static String getJobName(Task task) {
             WorkflowJob workflowJob = (WorkflowJob) task;
             return workflowJob.getFullName();
         }
+        logger.info(String.format("Unknown job found: %s; %s", task.getName(), task.getDisplayName()));
         return "unknown";
     }
 }