InterfaceManager: send device update messages to ctl

This commit makes the InterfaceManager send update messages to the
controller. These contain changes in devname and hwaddress of network
devices. This fixes the regression that controller would use old
information when resolving template functions.

Signed-off-by: Ondrej Lichtner <olichtne@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>