validate: do not validate lvm config if osd_auto_discovery is true
validate: do not validate lvm config if osd_auto_discovery is true

If osd_auto_discovery is set with the lvm scenario it's expected for
lvm_volumes and devices to be empty.

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible