RHV High-availability code (#562)

* Ensure HA Reservations are enabled on RHV cluster

* High availability option added to vms

* Added Emptydir Quota

* Updated vm stats and added affinity groups

* Made cluster name variable

* Strengthening negative affinity enforcement for masters and infra

* Added disks to masters, adjusted RAM and disk sizes

* Set enforced AGs to force wait

* Added tags

* Hacked ovirt dynamic inventory to always return eth0 as ansible_host

* Need a different hostname for master lb