stable/liberty CI: Network isolation support needs backport of multiple NIC templates

[James Slagle]

With the recent change to enable network isolation in tripleo-ci using the multiple NIC templates, we need to backport the patch to add those templates to stable/liberty to get CI passing again on stable/liberty.

That patch is:
https://review.openstack.org/#/c/287600/

However that patch is failing CI with:
2016-03-07 15:02:47.154 | | router_interface | 813994f9-4908-4610-acb4-f1146528bafc | BadRequest: resources.router_interface: Bad router request: Cidr 10.0.0.0/8 of subnet 126de4ce-644f-4fb4-84db-3fb6142d8f9c overlaps with cidr 10.0.0.0/24 of subnet 96f3b69c-15cf-41d0-980e-03938fe0f322 | CREATE_FAILED | 2016-03-07T14:43:35 |
2016-03-07 15:02:47.154 | | tenant-stack | 65a44a98-8d02-4817-b80f-f3f06abf5f2c | Resource CREATE failed: BadRequest: resources.router_interface: Bad router request: Cidr 10.0.0.0/8 of subnet 126de4ce-644f-4fb4-84db-3fb6142d8f9c overlaps with cidr 10.0.0.0/24 of subnet 96f3b69c-15cf-41d0-980e-03938fe0f322 | CREATE_FAILED | 2016-03-07T14:43:36 |

Looks like for some reason the -P to stack-create to change the value of the neutron subnet ranges during the ping test is not taking effect.

[James Slagle (james-slagle)]

Here are 2 proposed fixes:
https://review.openstack.org/#/c/289495/
https://review.openstack.org/#/c/289489/

This moves setting the subnet ranges from tripleo-ci to the heat templates in tripleo-common, so https://review.openstack.org/#/c/289489/ will also need a backport to stable/liberty once it is merged on master.