Update the lfs-setstripe.1 man page formatting and content.
Update the "lfs setstripe" usage message to be in "common use" order.

Test-Parameters: trivial
Reviewed-on: https://review.whamcloud.com/27066


Lustre-change-by: Andreas Dilger <andreas.dilger@intel.com>
Lustre-commit: aa83ef5a

Signed-off-by: Steve Guminski <stephenx.guminski@intel.com>
Change-Id: Ia761c7562fa398a8c1bb4354d09757cd5f3ebbe5
Reviewed-by: Jian Yu <jian.yu@intel.com>
Signed-off-by: Minh Diep <minh.diep@intel.com>
Reviewed-on: https://review.whamcloud.com/29627


Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>