Return error of command exec in SSH NativeClient
Return error of command exec in SSH NativeClient

Signed-off-by: Yuki Nishiwaki <303d976da0de3abf18cbadb68b9f1ac88eec0be4@gmail.com>

docker/machine,dweomer/docker-machine,exoscale/docker-machine,dweomer/docker-machine,docker/machine,exoscale/docker-machine