LHCBGAUSS-869: Fixed GaussGeo Issue in non-Sim09 versions
For all non-sim09 branches the selection of GaussGeo fails currently due to a mix up between using half GiGaGeo and half GaussGeo. As Sim09 works I suggest it be left alone and this fix only be ported to master (I think merging this into Sim09 would cause conflicts anyway).
Has been tested with lhcb-gauss-dev
and lhcb-g4r103