fix: spark.url file mode must be 0644

The other files in /etc/pcp/openmetrics/ are all 0644.  The latest
pmdaopenmetrics service will get a permission denied trying to open spark.url
without this mode change.

Signed-off-by: Rich Megginson <[email protected]>

Author: richm

roles/spark/tasks/main.yml

@@ -52,7 +52,7 @@
   template:
     src: spark.url.j2
     dest: "{{ __spark_metrics_conf }}"
-    mode: "0600"
+    mode: "0644"
   when:
     - spark_metrics_provider == 'pcp'
     - spark_metrics_agent | d(false) | bool