Apply Intranought netmask to all relevant VMs

Summary:
Noticed router-001 had 172.27.27.7 as broadcast,
as the netmask was a little too small.

Test Plan: /etc/rc.d/netif restart && /etc/rc.d/routing restart

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D2756