Make the old grubby take precedence over grubby-bls if is installed
    
    Not all bootloaders used in Fedora have BLS support, for example extlinux
    doesn't. So when using extlinux the old grubby tool has to be installed.
    
    Currently the grubby-bls wrapper has precedence over the old grubby tool,
    which means that even if grubby-deprecated is installed, the wrapper will
    executed when calling grubby. Make the old grubby take precedence instead.
    
    Related: rhbz#1654841
    
    Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>