Add crowbar-status and crowbar-failed in schema

Otherwise, barclamp_mgmt_lib.rb will edit the schema and add them, which
will make the files differ from the ones in the package.

Part of https://bugzilla.novell.com/show_bug.cgi?id=776583
Set proposal_schema_version to 2 in crowbar.yml

This is needed when we have crowbar-status/crowbar-failed in the schema.
Merge pull request #53 from vuntz/add-missing-attributes

https://github.com/crowbar/barclamp-dns/pull/53

Merged by devtool for cloudsleuth
Required syntax changes to support ruby version 1.9

"case" syntax changes and using "node.set[]=" instead of "node[]="
DNS is handled differently on Windows.

If platform is Windows, do not write the resolv.conf