Fix service subscriptions and definitions, add package overrides

Some things were a little off wrt. the way we usually do stuff.  This
change fixes the following:

- package resources take the override settings from node attributes
- all services subscribe to their config file
- the service definitions include restart and status actions, and
  enable services

Change-Id: I3d4a2f9247dda34a35897fdfe08d9e8cf27556b8
Closes-Bug: #1303777
Merge "Fix service subscriptions and definitions, add package overrides"