Open ETP Client crashes on multi-thread requests

Steps to reproduce:

Enable multi-thread benchmarks, there are several ToDo comments in the below files:

benchmark\client\ClientArrayBenchmark.cpp
benchmark\client\ClientConnectionBenchmark.cpp

Build and run oesBenchmark --benchmark_filter=Client

Expected result: Benchmarks should successfully pass

Actual result: Benchmarks crashes or reject request with error "Invalid Message-ID: Not monotonically increasing"