Avoid installing lxc on non Linux platforms (#1844)
Avoid installing lxc on non Linux platforms (#1844)

Avoid unittesting errors caused by the failed attempt to compile
lxc library on unsupported platforms.

Signed-off-by: Sorin Sbarnea <8938dff14221394d430a023580a32caf3bfb26a9@redhat.com>
metacloud/molecule,metacloud/molecule,metacloud/molecule