WIP: Remove the hard coded floating ip address

1. Created two floating IP address by using the OpenStack API.
2. Gets a list of floating IP addresses using the OpenStack API to calculate the correct host_ssh_ip.

Vagrantfile

 # -*- mode: ruby -*-
 # vi: set ft=ruby :
-
+def get_ssh_host_ip(floating_ip)
+  ip_byte_array = floating_ip.split(".")
+  return '164.111.161.'+ ip_byte_array[3]
+end
 Vagrant.configure("2") do |config|
 
+  ips =  `openstack floating ip list -c "Floating IP Address" -f value`
+  puts ips
+  ip_array = ips.split(' ')
+
   config.ssh.username = 'centos'
   config.vm.allowed_synced_folder_types = [:rsync]
   #config.ssh.private_key_path = "~/.ssh/id_rsa.pub"
@@ -28,12 +35,12 @@ Vagrant.configure("2") do |config|
 
   config.vm.define "ohpc" do |ohpc|
 
-    ohpc.ssh.host                      = '164.111.161.145'
+    ohpc.ssh.host                       = get_ssh_host_ip(ip_array[0])
     ohpc.vm.hostname                    = "ohpc"
     ohpc.vm.provider :openstack do |ohpc|
 
       ohpc.server_name                   = 'ohpc'
-      ohpc.floating_ip                   = "192.168.16.145"
+      ohpc.floating_ip                   = ip_array[0]
       ohpc.image                         = 'CentOS-7-x86_64-GenericCloud-1905'
     end
   end