LU-10898 tests: disable failing conf-sanity test

LU-10898 tests: disable failing conf-sanity test

The test_32a and test_32d runs are failing continuously for
ZFS filesystems (module unload problem).  Disable tests while
we investigate source and fix it.

Test-Parameters: trivial testlist=conf-sanity mdtfilesystemtype=zfs ostfilesystemtype=zfs
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Change-Id: Ia7e1fc7969c41d1fd46d6e9b078093704a1bed83
Reviewed-on: https://review.whamcloud.com/31960
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Tested-by: Jenkins
Reviewed-by: Saurabh Tandan <saurabh.tandan@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>