rpc/benchmark: Make benchmark test pass under XServers state.
rpc/benchmark: Make benchmark test pass under XServers state.

Change-Id: I1da0454c01b9c3147abafbd0a5588b271eda7abd

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref