kola/tests/docker: add btrfs docker-info test
kola/tests/docker: add btrfs docker-info test

This test is currently skipped because the security option check fails
on current releases.

This is because 'selinux' was disabled for btrfs in the wrapper script
for a while. See https://github.com/coreos/coreos-overlay/commit/e16987d397cdf839551d7970fedb57d00c4256fa

glevand/coreos--mantle,dm0-/mantle,dm0-/mantle,glevand/coreos--mantle