replaced e.printStackTrace() by output to log

Change-Id: I8820aa52255e2a4c4285e39fbd4476c6ee5cc0b7

java/com.sap.sailing.domain/src/com/sap/sailing/domain/markpassingcalculation/MarkPassingCalculator.java

@@ -291,7 +291,7 @@ public class MarkPassingCalculator {
             try {
                 executor.invokeAll(tasks);
             } catch (InterruptedException e) {
-                e.printStackTrace();
+                logger.log(Level.INFO, "mark passing calculation interrupted", e);
             }
         }