Re-order Zuul graphs

There is an easy correlation between the Executor load and the
amount of Running builds. By re-ordering graphs, we're able to get
them to show one directly above the other, making it easier to
spot trends in the data.

When they're in different columns, it's harder to see the
correlation.

Change-Id: I7706c3293fbd702695fb3e4e917e33ca947beef9

grafana/zuul-status.yaml

@@ -195,17 +195,17 @@ dashboard:
             - target: alias(stats.gauges.zuul.executors.online, 'Online')
             - target: alias(stats.gauges.zuul.executors.accepting, 'Accepting')
           type: graph
+        - title: Running Builds
+          span: 6
+          targets:
+            - target: aliasByNode(stats.gauges.zuul.executor.*.openstack.org.running_builds, 4)
+          type: graph
         - title: Executor Queue
           span: 6
           targets:
             - target: alias(stats.gauges.zuul.executors.jobs_queued, 'Queued Jobs')
             - target: alias(stats.gauges.zuul.executors.jobs_running, 'Running Jobs')
           type: graph
-        - title: Running Builds
-          span: 6
-          targets:
-            - target: aliasByNode(stats.gauges.zuul.executor.*.openstack.org.running_builds, 4)
-          type: graph
         - title: Load Average
           span: 6
           targets: