fix(ScheduledTaskService): [AoU-506] unschedule tasks before deleting them

https://issues.unige.ch/browse/AOU-506

AoU-ResourceServerCommon/src/main/java/ch/unige/aou/service/schedule/SchedulerService.java

@@ -62,11 +62,8 @@ public class SchedulerService extends AouService {
     if (abstractTaskRunnableOptional.isPresent()) {
       ScheduledFuture<AbstractTaskRunnable> scheduledFuture = abstractTaskRunnableOptional.get().getScheduledFuture();
       if (!scheduledFuture.isDone() && !scheduledFuture.isCancelled()) {
-        boolean killRunningTask = false;
-        if (schedulingCancelType == SchedulingCancelType.INTERRUPT_RUNNING_TASK) {
-          killRunningTask = true;
-        }
-        if (scheduledFuture.cancel(killRunningTask)) {
+        boolean interruptRunningTask = schedulingCancelType == SchedulingCancelType.INTERRUPT_RUNNING_TASK;
+        if (scheduledFuture.cancel(interruptRunningTask)) {
           this.removeScheduledAbstractTaskRunnable(scheduledTask);
         } else {
           throw new SolidifyRuntimeException("unable to cancel task '" + scheduledTask.getResId() + "' scheduling");