Connection#isValid(int timeout) does not obey the passed in timeout if the network is down.

Connection#isValid(int timeout) does not obey the passed in timeout if the network is down. Instead of obeying the timeout value, the call will hang until the socket timeout is hit. I've created a small example that you can use to reproduce the problem:

https://github.com/aaron-congo/mariadb-isvalid-bug