QC-1178 window length should be infinite if moving windows are not us…

…ed (#2302)

This is an optimization to avoid having QC tasks on grid publish objects often than needed, i.e. when they don't use moving windows, it's enough to publish them at end of stream.

Framework/src/TaskRunner.cxx

@@ -149,7 +149,8 @@ void TaskRunner::init(InitContext& iCtx)
 
   // setup timekeeping
   mDeploymentMode = DefaultsHelpers::deploymentMode();
-  mTimekeeper = TimekeeperFactory::create(mDeploymentMode, mTaskConfig.cycleDurations.back().first * 1000);
+  auto windowLengthMs = mTaskConfig.movingWindows.empty() ? 0 : (mTaskConfig.cycleDurations.back().first * 1000);
+  mTimekeeper = TimekeeperFactory::create(mDeploymentMode, windowLengthMs);
   mTimekeeper->setCCDBOrbitsPerTFAccessor([]() {
     // getNHBFPerTF() returns 128 if it does not know, which can be very misleading.
     // instead we use 0, which will trigger another try when processing another timeslice.