[contrail-dns] Add contrail dnsd support

Need https://github.com/Juniper/contrail-controller/pull/645
[contrail-control] Fix upstart job (use config file)
Merge pull request #40 from sbadia/dnsd

[contrail-dns] Add contrail dnsd support
Merge pull request #41 from sbadia/fix-control

[contrail-control] Fix upstart job (use config file)