Graphite container deployment

This deploys graphite from the upstream container.

We override the statsd configuration to have it listen on ipv6.
Similarly we override the ngnix config to listen on ipv6, enable ssl,
forward port 80 to 443, block the /admin page (we don't use it).

For production we will just want to put some cinder storage in
/opt/graphite/storage on the production host and figure out how to
migrate the old stats.  The is also a bit of cleanup that will follow,
because we half-converted grafana01.opendev.org -- so everything can't
be in the same group till that is gone.

Testing has been added to push some stats and ensure they are seen.

Change-Id: Ie843b3d90a72564ef90805f820c8abc61a71017d

zuul.d/infra-prod.yaml

@@ -526,6 +526,22 @@
       - playbooks/roles/logrotate
       - playbooks/roles/iptables/
 
+- job:
+    name: infra-prod-service-graphite
+    parent: infra-prod-service-base
+    description: Run service-graphite.yaml playbook.
+    vars:
+      playbook_name: service-graphite.yaml
+    files:
+      - inventory/
+      - playbooks/service-graphite.yaml
+      - inventory/service/host_vars/graphite02.opendev.org.yaml
+      - inventory/service/group_vars/graphite
+      - playbooks/roles/install-docker/
+      - playbooks/roles/pip3/
+      - playbooks/roles/graphite/
+      - playbooks/roles/iptables/
+
 # Run AFS changes separately so we can make sure to only do one at a time
 # (turns out quorum is nice to have)
 - job: