Description of problem:
The Heat template would allocate additonal floating ip for LB when selecting External loadbalancer. Actually we don't need the floating ip if we choose external loadbalancer.

Version-Release number of selected component (if applicable):
openshift-on-openstack v0.9.1

How reproducible:
100%

Steps to Reproduce:
1.Create a heat stack which selects external loadbalancer
2.
3.

Actual results:
After stack created successfully, found that a additional floating ip was allocated, and a unused file on bastion host /var/lib/ansible/host_vars/loadbalancer.yml was created:

[root@ghuang7-external-lb-bastion ansible]# cat /var/lib/ansible/host_vars/loadbalancer.yml
ansible_ssh_host: 10.66.147.193
ansible_hostname: ghuang7-external-lb-lb
ansible_default_ipv4:
    address: 10.66.147.193


Expected results:
Unused floating ips and /var/lib/ansible/host_vars/loadbalancer.yml should not be created. 

Additional info: