LU-7136 test: allow more time for copytools to stop

In sanity-hsm allow up to 200 seconds for the copytool to stop. This
is needed to prevent sporadic failures due to slow NFS (for the
copytool log file) delaying the termination of the copytool.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Icafc4e9c5a00c849dcb479233826de058d2ede62
Reviewed-on: http://review.whamcloud.com/17499
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>