Zap all .old files
Fix up the DNS recipe to properly handle partially-created nodes.
Use new v4 and v6 helpers.
Merge pull request #60 from VictorLowther/pull-req-master-fda77fb192c9c1d39e5891586544cf031c6d65bf

https://github.com/crowbar/barclamp-dns/pull/60

Merged by devtool for cloudedge