Fix stat /home/user/.docker/machine/boot2docker.iso: no such file or director
Fix stat /home/user/.docker/machine/boot2docker.iso: no such file or director

Signed-off-by: Robert Breker <bfcd7039ca4b92386f0756a1d5e67ea4ff23cfe0@citrix.com>

robertbreker/docker-machine-driver-xenserver,xenserver/docker-machine-driver-xenserver,xenserver/docker-machine-driver-xenserver,robertbreker/docker-machine-driver-xenserver