Merge branch 'cs-upgrade-redis-actionpack' into 'master'

Upgrade redis-rails from 4.0.0 to 5.0.1.

This updates redis-rails to 5.0.1 along with its dependencies. I helped upgrade redis-actionpack so it would work with both Rails 4.2 and 5.0 in the same version.

Unfortunately none of the gems have Changelogs :/

- redis-rails: https://github.com/redis-store/redis-rails
- redis-actionpack: https://github.com/redis-store/redis-actionpack
- redis-activesupport: https://github.com/redis-store/redis-activesupport
- redis-rack: https://github.com/redis-store/redis-rack
- redis-store: https://github.com/redis-store/redis-store

Working toward #14286.

See merge request !7291

Gemfile

@@ -152,7 +152,7 @@ gem 'settingslogic', '~> 2.0.9'
 gem 'version_sorter', '~> 2.1.0'
 
 # Cache
-gem 'redis-rails', '~> 4.0.0'
+gem 'redis-rails', '~> 5.0.1'
 
 # Redis
 gem 'redis', '~> 3.2'

Gemfile.lock

@@ -573,23 +573,23 @@ GEM
       json
     redcarpet (3.3.3)
     redis (3.2.2)
-    redis-actionpack (4.0.1)
-      actionpack (~> 4)
-      redis-rack (~> 1.5.0)
-      redis-store (~> 1.1.0)
-    redis-activesupport (4.1.5)
-      activesupport (>= 3, < 5)
-      redis-store (~> 1.1.0)
+    redis-actionpack (5.0.1)
+      actionpack (>= 4.0, < 6)
+      redis-rack (>= 1, < 3)
+      redis-store (>= 1.1.0, < 1.4.0)
+    redis-activesupport (5.0.1)
+      activesupport (>= 3, < 6)
+      redis-store (~> 1.2.0)
     redis-namespace (1.5.2)
       redis (~> 3.0, >= 3.0.4)
-    redis-rack (1.5.0)
+    redis-rack (1.6.0)
       rack (~> 1.5)
-      redis-store (~> 1.1.0)
-    redis-rails (4.0.0)
-      redis-actionpack (~> 4)
-      redis-activesupport (~> 4)
-      redis-store (~> 1.1.0)
-    redis-store (1.1.7)
+      redis-store (~> 1.2.0)
+    redis-rails (5.0.1)
+      redis-actionpack (~> 5.0.0)
+      redis-activesupport (~> 5.0.0)
+      redis-store (~> 1.2.0)
+    redis-store (1.2.0)
       redis (>= 2.2)
     request_store (1.3.1)
     rerun (0.11.0)
@@ -938,7 +938,7 @@ DEPENDENCIES
   redcarpet (~> 3.3.3)
   redis (~> 3.2)
   redis-namespace (~> 1.5.2)
-  redis-rails (~> 4.0.0)
+  redis-rails (~> 5.0.1)
   request_store (~> 1.3)
   rerun (~> 0.11.0)
   responders (~> 2.0)
@@ -994,4 +994,4 @@ DEPENDENCIES
   wikicloth (= 0.8.1)
 
 BUNDLED WITH
-   1.13.5
+   1.13.6