LU-6142 tests: Fix style issues for rwv.c

LU-6142 tests: Fix style issues for rwv.c

This patch fixes issues reported by checkpatch
for file lustre/tests/rwv.c

Test-Parameters: trivial testlist=sanity-flr
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: I574ef984e08a413569391d67a3a27abe9502438b
Reviewed-on: https://review.whamcloud.com/36385
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>