LU-8503 tests: fix replay-single/66b test

LU-8503 tests: fix replay-single/66b test

In replay-single test_66b replace lookup with touch
to ensure a new RPC is sent on each test invocation.

Author: Abrarahmed Momin <abrar.habib@seagate.com>

Signed-off-by: Abrarahmed Momin <abrar.habib@seagate.com>
Signed-off-by: Elena Gryaznova <c17455@cray.com>
Signed-off-by: Ashish Purkar <ashish.purkar@seagate.com>
Test-Parameters: trivial testlist=replay-single envdefinitions=ONLY=66b
Cray-bug-id: LUS-4868
Seagate-bug-id: MRP-3386
Reviewed-by: Rahul Deshmukh <rahul.deshmukh@seagate.com>
Reviewed-by: Ujjwal Lanjewar <ujjwal.lanjewar@seagate.com>
Change-Id: I87e91cccd8af92fe9ca2002127af934b8b02edfb
Reviewed-on: https://review.whamcloud.com/21941
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alexandr Boyko <c17825@cray.com>
Reviewed-by: Vladimir Saveliev <c17830@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>