Update machine types for qemu on RHEL
Issue
- While trying to make use of discard/fstrim to work within qemu/kvm for an image builder it has been found that the newer machine-types are not supported
- This makes the process of reducing size of images, a lenghty and space consuming process as post-processing of each image is required to do zero filling.
Environment
- Red Hat Enterprise Linux 7.2
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