We're looking to expand the available flavors to include flavors
with more ram. Since we are also beginning to test zuul-launcher
with the zuul project, let's add some flavors to the zuul-launcher
side of the house and let the zuul project drive a small amount
of workload on those flavors to identify any issues before rolling
it out to the rest of opendev.
This adds 4 and 16gb flavors as well as the standard 8gb. We can
probably run linter jobs on 4gb flavors, so let's try that. It
might help even out our usage (assuming we have enough ip addrs,
etc).
Change-Id: I70a7814bca455ca24ba3e812f65fa46d346a5d93
