SSH Timeout should be parameterized

[nicolasb827]

Hi,

when you want to create a host which is too long to start (>60 sec), you have a timeout error. This is a common problem with Rancher: https://github.com/rancher/rancher/issues/2154 I see timeout is set to defaultTimeout = 1 * time.Second in .go file. It could be nice that 1 was a parameter ;)

Thank you