Added "restart" step at the end of VM creation process

Updated openstack and setupuser modules to add "restart" step at
the end of VM creation process. This allows the VM to boot properly
after the user volume has been attached and a floating IP address,
if any, has been assigned.
Rename top level proxy.js to server.js

Two source files with the same name was getting confusing.

Change-Id: I34ef85e496feaa7321a7d7bdbf7b62c3206111ee