simplify distro detection for RHEL-derivatives
simplify distro detection for RHEL-derivatives

legal90/bento,tas50/bento,techmaniack/bento,devopxteam/bento,techmaniack/bento,norcams/bento,ConSol/bento,techmaniack/bento,jhoblitt/bento,juliandunn/bento,vincentaubert/bento,norcams/bento,loadsys/packer-builds,ConSol/bento,loadsys/packer-builds,lwieske/bento,legal90/bento,tas50/bento,ConSol/bento,devopxteam/bento,Oefenweb/bento,b1-systems/bento,chef/bento,Oefenweb/bento,lwieske/bento,tas50/bento,norcams/bento,lwieske/bento,juliandunn/bento,devopxteam/bento,legal90/bento,jhoblitt/bento,loadsys/packer-builds,vincentaubert/bento,chef/bento,devopxteam/bento,juliandunn/bento,vincentaubert/bento,chef/bento,b1-systems/bento