Don't depend on Nova for 'tap' and 'port_filter' constants
Don't depend on Nova for 'tap' and 'port_filter' constants

alexhersh/calico,neiljerram/felix,neiljerram/felix,neiljerram/felix,fasaxc/felix,nbartos/calico,beddari/calico,anortef/calico,ocadotechnology/calico,fasaxc/felix,alexaltair/calico,neiljerram/felix,anortef/calico,TrimBiggs/calico,ocadotechnology/calico,beddari/calico,Metaswitch/calico,kasisnu/calico,nbartos/calico,matthewdupre/felix,Metaswitch/calico,TrimBiggs/calico,kasisnu/calico,alexhersh/calico,alexaltair/calico,matthewdupre/felix