LU-9888 tests: Do not run conf-sanity 32b with ZFS

With recent changes to this test to support ZFS 0.7.1,
conf-sanity test 32b consistently fails in automated testing
with a ZFS file system. Add conf-sanity test 32b to the
ALWAYS_EXCEPT list for ZFS testing while the fialure is
investigated.

Test-Parameters: trivial testgroup=review-zfs-part-2
Signed-off-by: James Nunez <james.a.nunez@intel.com>
Change-Id: I1d5f7e5d02f0c318153eab0db01d8ae67ad93f13
Reviewed-on: https://review.whamcloud.com/28602
Tested-by: Jenkins
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>