LU-7372 test: Remove replay-dual test_26 from ALWAYS_EXCEPT

LU-7372 test: Remove replay-dual test_26 from ALWAYS_EXCEPT

The following patch to fix test 26 was checked into master and b2_10, but test 26 was
not added back to the test set:
  https://review.whamcloud.com/17853/
  https://review.whamcloud.com/28323/

Test-Parameters: trivial testlist=replay-dual

Change-Id: I5c72537b1b62b2a29882c8e03ce18f5a7766301a
Signed-off-by: Jim Casper <jamesx.casper@intel.com>
Reviewed-on: https://review.whamcloud.com/30677
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Cliff White <cliff.white@intel.com>
Reviewed-by: Saurabh Tandan <saurabh.tandan@intel.com>