Pooled connection timeout in pingConnection method

[arebordelo]

If the firewall drops packets or they are lost on the network, the pingConnection method in X ms drops this connection and gets a new one, and does not wait indefinitely the response. The time will be configured in networkPingTimeout property (in milliseconds). To reproduce this execute this in the database machine: sudo iptables -D INPUT -p tcp --sport $i -j DROP; sudo iptables -D OUTPUT -p tcp --dport $i -j DROP $i -> port of the connections