reduce the sleep from 2 mins to 10 seconds after a VM error

2 mins is waaaaaayyyyyyyyyyy tooooooooooo lllloooooonnnnnngggggggggg
retry the ssh connection 5 times
reduce the session close timeout to 3 seconds
flush the container ip address out of the arpcache

recommended by @jpetazzo

https://github.com/deis/deis/pull/873/files