LU-7372 tests: stop running replay-dual test 26

LU-7372 tests: stop running replay-dual test 26

replay-dual test 26 fails frequently. We need to add
this test to the ALWAYS_EXCEPT list and, thus, stop
running the test until we fix the issue.

Test-Parameters: trivial testlist=replay-dual
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: Ida58ecc4933dae33d396c258fee64f6d3dbd4978
Reviewed-on: https://review.whamcloud.com/32902
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>