Due to the way OpenStack Ansible and Nova work we can't update the value
for our ssh keys entries in nova. We need to create a new key then
switch everything over to that. Unfortunately, we've had a few people
request their keys be removed and a few others that haven't been active
since the last rotation. That means now is a good time to do a rotation
to clean up the set of valid keys.
Change-Id: Idb7c5eaa546096784e428b3cde61581dcc9050a2
c4a6ba9c03