LU-780 test: improve parallel-scale to support hyperion run

LU-780 test: improve parallel-scale to support hyperion run

We need to add support for srun/slurm, and a few tests
from hyperion-sanity script that has been used for hyperion
testing
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Change-Id: I30d5c9c84fed6f6533ec766e6278a9c86046e4a9
Reviewed-on: http://review.whamcloud.com/1662
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Cliff White <cliffw@whamcloud.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>