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

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

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

Test-Parameters: trivial testlist=sanity-sec
Signed-off-by: Arshad Hussain <arshad.super@gmail.com>
Change-Id: Id55ff1de3a4c05f04ebe446bfa394d9d0e32997c
Reviewed-on: https://review.whamcloud.com/36390
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>