LU-10793 test: re-add test_14b to replay-dual ALWAYS_EXCEPT

LU-10793 test: re-add test_14b to replay-dual ALWAYS_EXCEPT

The test_14b in replay-dual is removed from ALWAYS_EXCEPT list
in LU-10052 by https://review.whamcloud.com/#/c/30916/, but
the corresponding implementation is not ready, and this patch
re-add it to the ALWAYS_EXCEPT.

Test-Parameters: trivial testlist=replay-dual

Change-Id: I1027046b668e21f9fe4a47a0f46810f64b1ee954
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: https://review.whamcloud.com/31605
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>