Use the upstream policy.json file for nova
Do not reinstall neutron if already installed
Merge pull request #21 from vuntz/upstream-nova-policy

Use the upstream policy.json file for nova
Merge pull request #22 from vuntz/check-neutron-install

Do not reinstall neutron if already installed
Merge pull request #20 from SUSE-Cloud/release/roxy/master

supply neutron with policy.json