Simplify the DHCP crowbar.yml.
Get rid of metadata.json
Ditch unneeded chef data bags.
Merge pull request #145 from VictorLowther/pull-req-master-cfd54080692ef3d861af5ae115c411f0afc7af68

Minor fixups to let the network barclamp build. [1/1]
remove proposal dependencies - this will need more work to switch to barclamp_instances
find home for the interface test