Fixes #3653: Always set the vsphere guest_id, as recent versions of fog require it

fixes #3832 - foreman supplies user for GCE images, fog expects username

(cherry picked from commit 51908af77554e588e85f7a6f73f1ce3e15aa4157)

fixes #3110 Association of vSphere VMs fails

(cherry picked from commit 2ddd6b2cc8c37120c20d5bc5b8689ac5f8dfb883)

fixes #1719 - Add support for GCE

fixes #2288 - Add oVirt/RHEV Quota Support

fixes #1871, #1879 - add VPC support to EC2 compute resource

Based on patch from Romain Vrignaud <romain@yakaz.com>

fixes #1923 - matches vms on a compute resource to hosts

Fixes #2169 Openstack uses tenants

Fixes #2721 - Allow use of spice for libvirt via checkbox per-CR
Fixes #1711 - Add a per-CR checkbox for console passwords

Fixes #2833: remove direct endpoints from Rackspace compute resource