LU-15107 mdt: Exclusive create isn't replayed

LU-15107 mdt: Exclusive create isn't replayed

mdt_finish_open() fails on exclusive create check as
there isn't an infrormation that the file was created.

Set DISP_OPEN_CREATE for exclusive open replay,
as we know that the original request has succeeded.

Change-Id: Idc71db76b757670b91b3bb1718870a018a805ed2
HPE-bug-id: LUS-9358
Signed-off-by: Andriy Skulysh <c17819@cray.com>
Reviewed-by: Vitaly Fertman <c17818@cray.com>
Reviewed-by: Alexander Zarochentsev <c17826@cray.com>
Reviewed-on: https://review.whamcloud.com/45254
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>