openstack.json -> openstack.yaml

Change-Id: I538bd2379fe847159d0392db801319de3204edd4
Making Interfaces button available for deployed nodes

Change-Id: I925b1764d0262781a4dd5bea8917bdbba39a029d
Closes-bug: 1273599
Merge "openstack.json -> openstack.yaml"
Implementation of deployment stopping in Nailgun