prod-playbook: use job name for stats

Because "." is a field separator for graphite, we're incorrectly
nesting the results.

A better idea seems to be to store these stats under the job name.
That's going to be more helpful when looking up in Zuul build results
anyway.

Follow-on to I90dfb7a25cb5ab08403c89ef59ea21972cf2aae2

Change-Id: Icbb57fd23d8b90f52bc7a0ea5fa80f389ab3892e

playbooks/zuul/run-production-playbook.yaml

@@ -32,8 +32,8 @@
               # delta is in string format h:m:s.sss; convert to ms for statsd
               {% set delta = _run.delta.split(':') %}
               {% set delta_ms = ((delta[0]|int * 60 * 60 * 1000) + (delta[1]|int * 60 * 1000) + (delta[2]|float * 1000)) | int %}
-              echo 'bridge.ansible.{{ playbook_name }}.runtime:{{ delta_ms }}|ms' | nc -w 1 -u graphite.opendev.org 8125
-              echo 'bridge.ansible.{{ playbook_name }}.rc:{{ _run.rc }}|g' | nc -w 1 -u graphite.opendev.org 8125
+              echo 'bridge.ansible.{{ zuul.job }}.runtime:{{ delta_ms }}|ms' | nc -w 1 -u graphite.opendev.org 8125
+              echo 'bridge.ansible.{{ zuul.job }}.rc:{{ _run.rc }}|g' | nc -w 1 -u graphite.opendev.org 8125
           args:
             executable: '/bin/bash'