Enhance log statement in CU2

theodolite-benchmarks/uc2-application-flink/src/main/java/theodolite/uc2/application/HistoryServiceFlinkJob.java

@@ -133,9 +133,7 @@ public class HistoryServiceFlinkJob {
         }).name("map")
         .addSink(kafkaSink).name("[Kafka Producer] Topic: " + outputTopic);
 
-    if (LOGGER.isInfoEnabled()) {
-      LOGGER.info("Execution Plan: " + env.getExecutionPlan());
-    }
+    LOGGER.info("Execution plan: {}", env.getExecutionPlan());
 
     try {
       env.execute(applicationId);