Compute Resource menu was shown only if libvirt bindings were installed

fixes #1574 - ovirt - add remove and show volumes

• volume and interface ordering is now working
• removed include blank because it is a duplicate of the Blank ovirt-template.
• bootable is disabled when editing a vm, because currently I don't handle volume updates. just add and remove of a volume....

fixes #1452 use fog for libvirt management

This patch introduces a few new features:

• console support
• multiple disks
• multiple nics

first go at vmware integeration refs #955

this patch adds the ability to add a vmware compute resource, and display their console

Add Connection testing for EC2 compute

fixes #1540 added suport for provisioning on ovirt/rhvem using fog.

This patch addes a compute resource concept within foreman

Signed-off-by: Ohad Levy <ohadlevy@gmail.com>