LU-6559 test: use local tmp for HSM archive

LU-6559 test: use local tmp for HSM archive

In sanity-hsm.sh place the HSM archive in the tmp directory local to
the copytool.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Ied319cfca2481f19f726f91f065148c5675e006d
Reviewed-on: http://review.whamcloud.com/14659
Tested-by: Jenkins
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>