cli/snapshot : Dont Do the validation of snapshot config limit in CLI
               code path.

Problem : If we try to set the volume snap limit to
more that 256, it always shows value cannot exceed 256,
irrespective of system max limit.

Solution : Dont do validation in CLI side.

Change-Id: I292c0bc91a1806cd4906fca0151dd98135e6e49a
BUG: 1098122
Signed-off-by: Sachin Pandit <spandit@redhat.com>
Reviewed-on: http://review.gluster.org/7777
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>