MINIFICPP-1883 Enable compression in Prometheus client
MINIFICPP-1883 Enable compression in Prometheus client

Closes #1371
Signed-off-by: Marton Szasz <31b5bd3b18a572d1fc7a9fcda5b5dbc3d4eb31ff@apache.org>

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