When cloud-init processes an instance to determine
if it is first boot or not, it compares the config
drive UUID with the VM UUID. This change makes those
values the same now for a given VM / config drive pair.
Closes-Bug: #1770696
Change-Id: I128a0bc886b020d67241c67a874cf8d06e791b57
(cherry picked from commit 5d438733eb)