add_host bastion VM so ansible can use it

[brusMX]

Dynamically we will have to:

• Provision a bastion VM - #13 by @asinn826
• Create a new pair of SSH keys
• Propagate the SSH keys to the other VMs with authorized_keys module

• Add it to the ansible host list so it can perform actions like adding running the Openshift provisioning playbook and running verifications on the other VMs

  - name: Add new instance to host group
       add_host:
         hostname: "{{ item['ips'][0].public_ip }}"
         groupname: azure_vms
       with_items: "{{ azure.deployment.instances }}"

[brusMX]

done!