REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2535 The UNIT_TEST_STATUS and FAILURE_TYPE have used 0 as status, so use 0 as unknown is confused, remove it from array enumeration but keep it location in the array. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Sean Brogan <sean.brogan@microsoft.com> Cc: Bret Barkelew <Bret.Barkelew@microsoft.com> Signed-off-by: Guomin Jiang <guomin.jiang@intel.com> Reviewed-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>