#271 use pg_isready to check PG DB status
#271 use pg_isready to check PG DB status

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