LU-611 utils: lfs find --stripe-{count,size,index}

LU-611 utils: lfs find --stripe-{count,size,index}

Add options to "lfs find" so it can find files by their stripe-count,
stripe-index, and stripe-size. For stripe-index (alias ost-index) it
is possible to specify a comma-separated list of OST indexes. Make the
short options for these consistent between "lfs find", "lfs getstripe"
and "lfs setstripe", keeping the old options for usage compatibility.
Add sanity.sh tests for the new "lfs find -c, -i, -S" options.

Add a verbose deprecation for "lfs {get,set}stripe --offset" (which
is too vague a term) and suggest "lfs {get,set}stripe --index",
which existed since Lustre 1.8.1 and can be used for interop tests.
The prefered long-term option name is --stripe-index, but this is not
available in Lustre 1.8.x and would break interop tests.

Remove deprecated "-v", "-q", and "-r" options from "lfs find".  These
are holdovers from when "lfs find" and "lfs getstripe" were the same
command, and have been verbosely deprecated since the 1.6.4 release.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Ia90de17e39e38543bcd9bc5a9861533accf6c158
Reviewed-on: http://review.whamcloud.com/1264
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Li Wei <liwei@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>