HACKING: update HACKING.rst file to include latest changes
HACKING: update HACKING.rst file to include latest changes

Commit 3491cbc0c510404bfb4ddc2e60fde5c5d23400fd updated a hacking
check but did not update the HACKING.rst file.

Change-Id: Ie9be701f61da93686b79df23f1acf14008e4d486

dims/neutron,noironetworks/neutron,igor-toga/local-snat,sebrandon1/neutron,klmitch/neutron,mahak/neutron,MaximNevrov/neutron,huntxu/neutron,MaximNevrov/neutron,wolverineav/neutron,igor-toga/local-snat,bigswitch/neutron,openstack/neutron,mahak/neutron,eayunstack/neutron,mahak/neutron,cloudbase/neutron,klmitch/neutron,sebrandon1/neutron,wolverineav/neutron,dims/neutron,cloudbase/neutron,noironetworks/neutron,bigswitch/neutron,eayunstack/neutron,huntxu/neutron,openstack/neutron,openstack/neutron