LU-17019 tests: fix 'v' usage in test 185

LU-17019 tests: fix 'v' usage in test 185

Test 185 provides 'v' to multiop when using the
multiop_bg_pause function, which already adds 'v' to the
multiop command.  Using a verbosity level > 2 breaks the
code which checks the multiop output for PAUSING, now that
there is other text in that output.

Fixes: 84376bf674 ("LU-13805 tests: add unaligned io to multiop")
Signed-off-by: Patrick Farrell <pfarrell@whamcloud.com>
Change-Id: I7023e47956e32a3f681fec504a1fc9200dbbf24f
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51898
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>