V1.4.3

Modify the way we ping the servers adding a timeout to avoid the tool to hang because node was not reachable.
We have add the option to set a ping timeout when testing the connections.

The problem solved here is that when pinging without timeout if the node is not reachable the action remain hang for very long time.
Adding the timeout will allow the process to exit and report the error.
Additional parameter to drive this has been added for PXC cluster/nodes and ProxySQL.
The two values are independent.
The timeout value cannot be larger than the checkTimeOut.
The default value for pingTimeout is 1 second expressed in milliseconds pingTimeout=1000