MINIFICPP-1451: ThreadPoolAdjust test transiently failed on Windows CI
MINIFICPP-1451: ThreadPoolAdjust test transiently failed on Windows CI

Signed-off-by: Arpad Boda <aboda@apache.org>

This closes #1000

dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp,dtrodrigues/nifi-minifi-cpp