Testing the compatibility of the HydroGrid file with the domain
We have run into strange behaviours of RoutingPreProc when the HydroGrid file (HydroFile in the run.def) is smaller than the domain of the atmospheric grid. To avoid this we have to test that the atmospheric domain is within the domain covered by HydroGrid. Particularly important for HydroSHEDS which is not global but probably also for MERIT when somebody wants to run with Antarctica included.