LU-2829 tests: sanityn/33a cleanup messages for zfs

Remove ldiskfs specific checks from running on zfs.
Account for lvm disks for ldiskfs.

Signed-off-by: Nathaniel Clark <nathaniel.l.clark@intel.com>
Change-Id: I15cdb33d095c465b117761d40d61579eb3fbf52a
Reviewed-on: http://review.whamcloud.com/5693
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Keith Mannthey <keith.mannthey@intel.com>