using a forked copy of the redis-activesupport gem

The background: at this moment in time, the redis-cache gem has a bug around configuring
options (redis-store/redis-store#169) and the forked repo contains the fix.
Hopefully the patch will be fixed upstream at some point.

Gemfile

@@ -25,6 +25,7 @@ else
   gem "gds_zendesk", '0.0.5'
 end
 gem 'redis-rails', '3.2.3'
+gem 'redis-activesupport', '3.2.3', :git => "https://github.com/alphagov/redis-store", :branch => "connection_url", :ref => '2f9efcf48e124be3279e2f8864c979f999bed2ad'
 
 group :development do
   gem "quiet_assets", "1.0.2"

Gemfile.lock

@@ -1,3 +1,24 @@
+GIT
+  remote: https://github.com/alphagov/redis-store
+  revision: 2f9efcf48e124be3279e2f8864c979f999bed2ad
+  ref: 2f9efcf48e124be3279e2f8864c979f999bed2ad
+  branch: connection_url
+  specs:
+    redis-actionpack (3.2.3)
+      actionpack (~> 3.2.3)
+      redis-rack (~> 1.4.0)
+      redis-store (~> 1.1.0)
+    redis-activesupport (3.2.3)
+      activesupport (~> 3.2.3)
+      redis-store (~> 1.1.0)
+    redis-rack (1.4.2)
+      rack (~> 1.4.1)
+      redis-store (~> 1.1.0)
+    redis-rails (3.2.3)
+      redis-actionpack (~> 3.2.3)
+      redis-activesupport (~> 3.2.3)
+      redis-store (~> 1.1.0)
+
 GEM
   remote: https://rubygems.org/
   remote: https://BnrJb6FZyzspBboNJzYZ@gem.fury.io/govuk/
@@ -184,22 +205,8 @@ GEM
     rake (10.0.3)
     rdoc (3.12.2)
       json (~> 1.4)
-    redis (3.0.2)
-    redis-actionpack (3.2.3)
-      actionpack (~> 3.2.3)
-      redis-rack (~> 1.4.0)
-      redis-store (~> 1.1.0)
-    redis-activesupport (3.2.3)
-      activesupport (~> 3.2.3)
-      redis-store (~> 1.1.0)
-    redis-rack (1.4.2)
-      rack (~> 1.4.1)
-      redis-store (~> 1.1.0)
-    redis-rails (3.2.3)
-      redis-actionpack (~> 3.2.3)
-      redis-activesupport (~> 3.2.3)
-      redis-store (~> 1.1.0)
-    redis-store (1.1.3)
+    redis (3.0.3)
+    redis-store (1.1.2)
       redis (>= 2.2.0)
     rubyzip (0.9.9)
     sass (3.2.5)
@@ -278,6 +285,7 @@ DEPENDENCIES
   poltergeist (= 0.7.0)
   quiet_assets (= 1.0.2)
   rails (= 3.2.13)
+  redis-activesupport (= 3.2.3)!
   redis-rails (= 3.2.3)
   sass-rails (~> 3.2.3)
   shoulda (~> 3.3.2)