Metering: add and apply metering property at rules

Change-Id: Ie5819638187a2a6e5c0901520330741b73c45595
Signed-off-by: Guillermo Ontanon <guillermo@midokura.jp>
Metering: let rule conditions match on traversed devices

Change-Id: I3b549b4cb324571b918df358544386d443dceb02
Signed-off-by: Guillermo Ontanon <guillermo@midokura.jp>
Merge changes from topic 'm/metering'

* changes:
  Metering: let rule conditions match on traversed devices
  Metering: add and apply metering property at rules