These changes add a new data source to cloud-init to support passing user
data to RHEVm and vSphere. The user data is passed to RHEVm v3.0 (current
version) using a floppy injection hook and to vSphere via cdrom device.
RHEVm v3.1 will use a method similar to vSphere. Once available support
for that is also expected.
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