Network node_control field

Change-Id: I22c2cde073992a5d9b9664248040a0f16531be37
blah

Change-Id: I18a11f8104f6fff6e157154ba2de7448f94b1e88
Single migration

Change-Id: I371be876824283eef60340d48245a4e7b7b4375e
DRY in models

Change-Id: Idc740a08550220a87a28a849b6e8fbc57548b936