This function will copy elements lSimSource$vCov1,..., lSimSource$vCovXX to lSimDet and return the updated lSimDet. The names vCov1, vCov2,... must be consecutive and cannot skip eg, vCov1, vCov3 will the function will stop after copying vCov1.
# S3 method for default CopyCovariates(lSimDest, lSimSource)