puppet: Set correct permissions for supervisor.sock.

We can't do this with a "file" entry because it doesn't handle objects
of type socket.

(imported from commit 5f0f79f1a7905c4d70cc7e2f4c474b0629841c12)

servers/puppet/modules/zulip/manifests/supervisor.pp

@@ -20,4 +20,10 @@ class zulip::supervisor {
     hasrestart => true,
     restart => "supervisorctl reload"
   }
+
+  exec { "fix_supervisor_socket_permissions":
+    command => "chown humbug:humbug /var/run/supervisor.sock",
+    unless => "bash -c 'ls -ld /var/run/supervisor.sock | cut -f 3-4 -d\" \"  | grep -q \"^humbug humbug$\"'",
+    require => Service["supervisor"],
+  }
 }