LU-7501 utils: keep lfs arguments consistent

LU-7501 utils: keep lfs arguments consistent

lfs getstripe use -m and deprecate -M to match lfs setstripe

lfs setstripe use --ost to match lfs find and deprecate --ost-list

lfs find add --mdt-index to match lfs setstripe

lfs getstripe and migrate add --mdt to match lfs find

lfs setdirstripe add --mdt-count|-c, --mdt-index|-m, --mdt-hash as
    aliases for the existing --count|-c and --index|-i and
    --hash-type|-t options

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: I8983b7438e7046657a087e97d9fbc467242c9dd8
Reviewed-on: http://review.whamcloud.com/22581
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>