LU-9167 hsm: use a new environment during HSM purge

LU-9167 hsm: use a new environment during HSM purge

In hsm_cancel_all_actions() use a newly allocated environment instead
of borrowing it from the coordinator.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: Idd5f05d1d5629f4e4e627e137e3addc1a51f8a96
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: https://review.whamcloud.com/25730
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>