Adds generation of public and private rsa ssh keys in nova overrides.
These will be used by nova helm charts (see dependent commit) to fill
appropriate files in all nova-compute pods in cluster. ssh keys are
stored in sysinv db to maintain consistency.
Also need to provide subnet used for ssh which will be cluster host
network per recent commit (If6b918665131f01bc62687fbdc7978c5c103e3b7).
Story: 2003909
Task: 28925
Depends-On: Id789ba051cec019e8b7564c713cf1b5296ecf9f6
Change-Id: I13aa90b1204e698846d4402048b3ca7f544da551
Signed-off-by: Gerry Kopec <gerry.kopec@windriver.com>
a0be71beaa