guestfs-tools security, bug fix, and enhancement update

1.48.2-5 - Rebase to guestfs-tools 1.48.2 resolves: rhbz2059286 - Default to --selinux-relabel in various tools resolves: rhbz2075718, rhbz2089748 - Add lvm system.devices cleanup operation to virt-sysprep resolves: rhbz2072493 - Refactor virt-customize --install, --update options in common...