Create an instance DNS record based on instance UUID.
Create an instance DNS record based on instance UUID.

Previously we created one based on instance name only.  Since
name is not guaranteed to be unique, best to have one based
on uuid as well.  Both point to the same address, of course.

For blueprint public-and-private-dns.

Change-Id: Ibb17f2a49f00b4522205d6b4508f432f6f5b0c5d

n0ano/ganttclient