Set external_lb_address to eth0's address in all-in-one build
Set external_lb_address to eth0's address in all-in-one build

This patch sets the external_lb_address to the instance's eth0 address
to ensure that any services that rely on accessing that address are able
to do so.

Change-Id: Ie5955eaedef14f5916ec19203f8724e107a409da
Closes-Bug: #1404305

achekunov/openstack-ansible,weezer/openstack-ansible,open-switch/infra_openstack-ansible,stevelle/os-ansible-deployment,yanyao/openstack-deployment-liberty,wenhuizhang/os-ansible-deployment,open-switch/infra_openstack-ansible,sti-jans/openstack-ansible,hughsaunders/openstack-ansible,cloudnull/os-ansible-deployment,cfarquhar/openstack-ansible,yanyao/openstack-ansible,sigmavirus24/openstack-ansible,metral/os-ansible-deployment,achekunov/openstack-ansible,yanyao/openstack-deployment,yanyao/openstack-deployment-liberty,bunchc/openstack-ansible,sacharya/os-ansible-deployment,pombredanne/os-ansible-deployment,jpmontez/openstack-ansible,weezer/openstack-ansible,sigmavirus24/os-ansible-deployment,stackforge/os-ansible-deployment,robb-romans/openstack-ansible,git-harry/os-ansible-deployment,mancdaz/openstack-ansible,antonym/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,yanyao/openstack-deployment-liberty,miguelgrinberg/os-ansible-deployment,mattt416/ansible-lxc-rpc,sti-jans/openstack-ansible,git-harry/os-ansible-deployment,shane-c/openstack-ansible,mattt416/ansible-lxc-rpc,major/os-ansible-deployment,wenhuizhang/os-ansible-deployment,robb-romans/openstack-ansible,yanyao/openstack-deployment,sti-jans/openstack-ansible,open-switch/infra_openstack-ansible,manuelfelipe/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,VaneCloud/openstack-ansible,mrda/openstack-ansible,stevelle/os-ansible-deployment,d34dh0r53/os-ansible-deployment,openstack/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,jpmontez/os-ansible-deployment,openstack/openstack-ansible,jpmontez/os-ansible-deployment,miguelgrinberg/os-ansible-deployment,antonym/openstack-ansible,pombredanne/os-ansible-deployment,BjoernT/openstack-ansible,mattt416/ansible-lxc-rpc,Logan2211/openstack-ansible,shane-c/openstack-ansible,BjoernT/os-ansible-deployment,bunchc/openstack-ansible,Logan2211/openstack-ansible,os-cloud/os-ansible-deployment,os-cloud/os-ansible-deployment,sigmavirus24/openstack-ansible,antonym/openstack-ansible,sacharya/os-ansible-deployment,achekunov/openstack-ansible,pombredanne/os-ansible-deployment,hughsaunders/openstack-ansible,manuelfelipe/openstack-ansible,yanyao/openstack-ansible,BjoernT/openstack-ansible,metral/os-ansible-deployment,mattt416/ansible-lxc-rpc,jpmontez/openstack-ansible,stevelle/openstack-ansible,manuelfelipe/openstack-ansible,major/os-ansible-deployment,d34dh0r53/os-ansible-deployment,jpmontez/os-ansible-deployment,hughsaunders/openstack-ansible,yanyao/openstack-deployment,stevelle/openstack-ansible,VaneCloud/openstack-ansible,sigmavirus24/os-ansible-deployment,hughsaunders/openstack-ansible,mancdaz/openstack-ansible,BjoernT/os-ansible-deployment,major/openstack-ansible,VaneCloud/openstack-ansible,yanyao/newton,hughsaunders/os-ansible-deployment,dhanunjaya/os-ansible-deployment,shane-c/openstack-ansible,cloudnull/os-ansible-deployment,stackforge/os-ansible-deployment,major/openstack-ansible,mrda/openstack-ansible,hughsaunders/os-ansible-deployment,dhanunjaya/os-ansible-deployment,mrda/openstack-ansible,jpmontez/openstack-ansible,cfarquhar/openstack-ansible,hughsaunders/os-ansible-deployment,yanyao/newton,BjoernT/os-ansible-deployment,yanyao/openstack-deployment,git-harry/os-ansible-deployment,hughsaunders/os-ansible-deployment