LU-3939 tests: sanity-hsm/test_40 needs a local HSM_ARCHIVE

LU-3939 tests: sanity-hsm/test_40 needs a local HSM_ARCHIVE

sanity-hsm/test_40 suffers frequent failures during auto-test due
to remote/NFS-mounted HSM_ARCHIVE causing the 400 archive requests
to take more than 100s to be drained from copytool requests queue.
This patch allows copytool_setup func to allow each sub-test to
specify a non-default hsm-root/HSM_ARCHIVE dir and test_40 uses it.
And for sure, remove test_40 from exception list.

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Change-Id: I00e7df7b3cc5530cb96177a61ca6e07f1c784297
Reviewed-on: http://review.whamcloud.com/7703
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>