fix os_label for PRTEST-2016-GEN-P8-30000000-10Kevts on lhcb-gauss-gen-dev and...
fix os_label for PRTEST-2016-GEN-P8-30000000-10Kevts on lhcb-gauss-gen-dev and x86_64-centos7-gcc8-opt
fix os_label for PRTEST-2016-GEN-P8-30000000-10Kevts on lhcb-gauss-gen-dev and x86_64-centos7-gcc8-opt