use multiple streams to reduce the amount of useless message processi… #134

Job	Run time
roadblock-ci-tests (Run small roadblock test, --followers 5)	2m 7s
roadblock-ci-tests (Run roadblock timeout test, --followers 5 --timeout)	3m 39s
roadblock-ci-tests (Run roadblock abort test, --followers 5 --abort)	1m 58s
roadblock-ci-tests (Run large roadblock test, --followers 50)	11m 35s
roadblock-ci-tests (Run wait-for test, --followers 5 --wait-for)	2m 41s
roadblock-ci-tests (Run wait-for heartbeat timeout test, --followers 5 --wait-for-heartbeat-timeout)	2m 27s
roadblock-ci-tests (Run wait-for abort test, --followers 5 --wait-for-abort)	2m 26s
roadblock-ci-tests (Run 1 Leader SIGINT (abort) test, --followers 5 --leader-sigints 1)	2m 15s
roadblock-ci-tests (Run 2 Leader SIGINT (exit) test, --followers 5 --leader-sigints 2)	2m 41s
roadblock-ci-complete	1s
	31m 50s

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