LU-14585 tests: use striped ha_test_dir

LU-14585 tests: use striped ha_test_dir

currently ha.sh has the ability to create the clients
striped directories with different stripe parameters.
We also need the ability to create working striped
directory (ha_test_dir) to have the chance to replicate
the issues hit on directory tree where child directory
stripe settings differ from parent ones.

Test-Parameters: trivial
Signed-off-by: Elena Gryaznova <elena.gryaznova@hpe.com>
HPE-bug-id: LUS-9621
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Reviewed-by: Vladimir Saveliev <vladimir.saveliev@hpe.com>
Change-Id: I77612c360f0bf407bd0298f827b409b4a288540f
Reviewed-on: https://review.whamcloud.com/43216
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Vladimir Saveliev <c17830@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>