Switch to nodes.yaml composer file
Switch to nodes.yaml composer file

- use node1 and node2 names
- remove hardcoded node0 in create_controller

Change-Id: I8eb0f01e19c5f1831410d8a64583849b14b3ada2

pigmej/solar,openstack/solar,openstack/solar,openstack/solar,pigmej/solar,pigmej/solar