gitlab/resque.yml: Tweak to integrate gitlab with internal redis

A simple change just to point resque to redis unix socket.

/cc @kazuhiko, @jerome

software/gitlab/instance-gitlab.cfg.in

@@ -166,6 +166,8 @@ template = {{ rack_attack_rb_in }}
 [resque.yml]
 <= gitlab-etc-template
 template= {{ resque_yml_in }}
+context-extra =
+    section redis                   service-redis
 
 [smtp_settings.rb]
 <= gitlab-etc-template

software/gitlab/template/resque.yml.in

@@ -4,4 +4,4 @@
 # https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/files/gitlab-cookbooks/gitlab/templates/default/resque.yml.erb
 # (last udpdated for omnibus-gitlab 8.2.3+ce.0-0-g8eda093)
 
-production: <%= @redis_url %>
+production: unix://{{ redis.unixsocket }}