Add swift_account resource

This change adds the swiftaccount resource with some entitites:

storage.objects.incoming.bytes
storage.objects.outgoing.bytes
storage.api.request
storage.objects.size
storage.objects
storage.objects.containers

Change-Id: I77fa749df1f37e6705e7f943afc3aff1d51d0e6e
Merge "Add swift_account resource"