def register_result(self, apply_result):
        self._expected += 1
Run a nodetool command simultaneously on each node specified
dataset/ETHPy150Open serverdensity/sd-agent/checks/libs/thread_pool.py/UnorderedResultCollector.register_result--crossover with--dataset/ETHPy150Open datastax/cstar_perf/tool/cstar_perf/tool/benchmark.py/nodetool_multi