Restart apache2 on logrotate on ask.o.o

When apache2 gets reloaded multiple times in quick succession, it may
crash and fail completely. Lately this has been seen very often on our
ask.openstack.org instance, so let us use the more intrusive, but also
hopefully more stable in the end result method of restarting instead.

Change-Id: I44e4561f8696415471f65b75d683c48636fb413f

modules/openstack_project/manifests/ask.pp

@@ -187,5 +187,9 @@ class openstack_project::ask (
       'notifempty',
       'create 640 root adm',
     ],
+    postrotate => [
+      "if service ${::httpd::params::apache_name} status > /dev/null; then \\",
+      "  service ${::httpd::params::apache_name} restart > /dev/null; fi; \\",
+    ],
   }
 }