Fixup cri-o metacopy mount options (#7287)

Ubuntu 18.04 crio package ships with 'mountopt = "nodev,metacopy=on"'
even if GA kernel is 4.15 (HWE Kernel can be more recent)

Fedora package ships without metacopy=on

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>