Convert SwiftDevicesAndProxyConfig to composable format

Convert SwiftDevicesAndProxyConfig to composable format

Make use of the new composable per-service node_ips lists by
adding a ServiceNetMap entry for SwiftStorage, then
pass the data to construct the raw device list into puppet-tripleo
instead of mangling it in t-h-t inside the role templates.

This will allow running swift storage services on nodes other than
the Controller and ObjectStorage roles, and is required to enable
custom roles.

Depends-On: I11deed1df712ecccf85d36a75b3bd2e9d226af36
Change-Id: I1bf5f8a9d34b1a5d64ab8656b386226b54ec1a27
Partially-Implements: blueprint custom-roles