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In 'allocate' mode, the documentation specifies that we export the
hypervisor value (“Allocation needs, in addition: … hypervisor, the
hypervisor of this instance”) and we need that on input, however we
don't actually export it.
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>