Wait for loadbalancer to be ready instead of sleeping
Wait for loadbalancer to be ready instead of sleeping

This makes the creation of resources in the sample Vagrant
configuration less dependent on the host resources or hypervisor
execution time.

Before this, the local.sh was randomnly failing at any of it's steps
in my environment.

Change-Id: Ie3795a1f9244b46f5b6469107ad1d03f087a64ed

openstack/octavia,openstack/octavia,openstack/octavia