filestore-to-bluestore: fix undefine osd_fsid_list

filestore-to-bluestore: fix undefine osd_fsid_list

If the playbook is used on a host running bluestore OSDs then the
osd_fsid_list won't be filled because the bluestore OSDs are reported
with 'type: block' via ceph-volume lvm list command but we are looking
for 'type: data' (filestore).

TASK [zap ceph-volume prepared OSDs] *********
fatal: [xxxxx]: FAILED! =>
  msg: '''osd_fsid_list'' is undefined

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1729267
Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>