LU-9887 tests: ignore error sanity-lfsck test 9a,b

LU-9887 tests: ignore error sanity-lfsck test 9a,b

sanity-lfsck tests 9a and 9b are failing consistently on
checking that speed limiting LFSCK takes less time than the
user defined maximum speed. We should ignore these errors
for now and print the layout or namespace to help understand
this issue.

Test-Parameters: trivial testgroup=review-zfs-part-1
Test-Parameters: testgroup=review-dne-part-2

Signed-off-by: James Nunez <james.a.nunez@intel.com>
Change-Id: I64cac59edd456e6fd519961a4055130c8dbc8a4a
Reviewed-on: https://review.whamcloud.com/28588
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>