Fix router's interface listing view

To get all the ports for a router Horizon uses port_list
filtering by the device_id value which in vanilla openstack
is the quantum router_id, but we use the akanda_id as value for
that field so  the listing doesn't work for us. Lets replace the
port_list call with router_get.

Change-Id: Ibaabb11b2afa97aa2445776842afbdd5c6c2563d
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>
Fix the router's interfaces listing view to show only the
interfaces on the user's networks filtering out interfaces
on the mgt and public networks.

DHC-1512

Change-Id: I9b68b75d5e8325c4c70090fa500a417e23b1836f
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>
Modify the interfaces listing view to filter only the port on
the mgt network

DHC-1512

Change-Id: If7e5aebf7cfd7e87df0dea8cd749764c142f1676
Signed-off-by: Rosario Di Somma <rosario.disomma@dreamhost.com>
Merge pull request #28 from rodis/bug/fix-router-interface-view-havana

Bug/fix router interface view havana