Add missing 'IsIntStore' argument in 'CreateCalibOptions'

The 'IsIntStore' argument has been unfortunatly removed since commit 29284029.
In fact, this argument is needed to choose the right set of transformed parameter uses at the grid-screening step (see ..StartParamTransfo() in CreateCalibOptions()).

Currently the GR5H model used with the interception store uses the set of transformed parameter optimized for GR5H without interception. The paremeter set found during the calibtation step is not as good as expected.