Add install/remove package helpers to advise
The smart card advise scripts assume that yum is installed. However
Fedora has dnf and the yum wrapper is not installed by default.
Installation and removal of packages is now provided by two helper
methods that detect the package manager.
Signed-off-by: Christian Heimes <firstname.lastname@example.org>
Reviewed-By: Alexander Bokovoy <email@example.com>