#318 revert gunicorn back to version 19.9.0
#318 revert gunicorn back to version 19.9.0

geopython/GeoHealthCheck,justb4/GeoHealthCheck,justb4/GeoHealthCheck,justb4/GeoHealthCheck,geopython/GeoHealthCheck,geopython/GeoHealthCheck,justb4/GeoHealthCheck,geopython/GeoHealthCheck