LU-7813 lov: rename LOV_MAGIC_V*_DEF to *_DEFINED

LU-7813 lov: rename LOV_MAGIC_V*_DEF to *_DEFINED

Rename LOV_MAGIC_V1_DEF to LOV_MAGIC_V1_DEFINED so that it is not
confused with "_DEFAULT" as one might expect.

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Idb98fc24974a105077bf75bb122006fad34d69e2
Reviewed-on: https://review.whamcloud.com/18888
Tested-by: Jenkins
Reviewed-by: Steve Guminski <stephenx.guminski@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>