staypuft: added steps to configure network

- added module for some steps staypuft deployments
- add task to assign subnet typings
- added draft of tasks to create subnet
- added task to assign interfaces
- changed interfaces and subnet names to disambiguate internal
  (deployment use)

Change-Id: Ib31e9953799fe064b82539c74c3b8c4f7d1d9180