LU-7763 tests: improve sanityn 33d

LU-7763 tests: improve sanityn 33d

Sanityn.sh 33d verifies that CoS (Commit-on-Sharing) for DNE, but if
transaction commits before unlock, CoS will not be triggered. To
avoid this, do all tests twice, it's unlikely that both will fail.

Test-Parameters: trivial testlist=sanityn mdscount=2 mdtcount=4
Signed-off-by: Lai Siyao <lai.siyao@intel.com>
Change-Id: I590327111f7be2df233568ce408ee56a5af1d73a
Reviewed-on: https://review.whamcloud.com/31946
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>