Make sure VarOpti is called in the right place in the MCF pipeline with BL.
Currently, when creating a BL mesh from CAD using the MCF, if VarOpti is called from the command line with -m varopti:... the pipeline calles VarOpti only after the full generation of the split BL, resulting in no improvments. We need to make the modules aware of this and call VarOpti prior to calling the ProcessBL and splitting the BL without having to manipulate the pipeline manually by generating only a single element in the MCF, then executing NekMesh with -m varopti:... -m processbl:... as one needs to do now.