add rocky to the release dashboard
add rocky to the release dashboard

We aren't doing rocky releases, yet, but it's coming up so be ready
for it. Because gerrit limits dashboards to 10 queries, remove newton at
the same time.

Change-Id: I056b0b8a873e8ca43e9a5902296bc78d13cb42e6
Signed-off-by: Doug Hellmann <0798ebecfb7bc4dfb9d0445c2fa030eb64e1fa1c@doughellmann.com>

stackforge/gerrit-dash-creator