MRP-1919 tests: test ost's multi-client recovery

this test causes target recovery thread to process replay requests not
in order of transaction numbers

Signed-off-by: Vladimir Saveliev <vladimir_saveliev@xyratex.com>
Change-Id: I7a30606d4695d093ea49a9988b7a8d5541f83b4f
Reviewed-on: http://es-gerrit.xyus.xyratex.com:8080/2700
Tested-by: Jenkins
Tested-by: Elena Gryaznova <elena_gryaznova@xyratex.com>
Reviewed-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Reviewed-by: Elena Gryaznova <elena_gryaznova@xyratex.com>
Reviewed-by: Vitaly Fertman <vitaly_fertman@xyratex.com>
Revert "MRP-1035 ldlm: report last_committed value using export/obd"

This reverts commit b76b8c6d770c45ac41818c6cff3d21baa8a05b4c.