Small refactor and a few documentation fixes

doc/administration/high_availability/redis.md

@@ -59,9 +59,9 @@ Redis.
 ## Experimental Redis Sentinel support
-> [Introduced][ce-1877] in GitLab 8.10.
-Since GitLab 8.10, you can configure a list of Redis Sentinel servers that
+> [Introduced][ce-1877] in GitLab 8.11.
+Since GitLab 8.11, you can configure a list of Redis Sentinel servers that
 will monitor a group of Redis servers to provide you with a standard failover
 support.

lib/gitlab/mail_room.rb

@@ -13,8 +13,8 @@ module Gitlab
         @config ||= fetch_config
       end
-      def reload_config!
-        @config = fetch_config
+      def reset_config!
+        @config = nil
       end
       private

lib/gitlab/redis.rb

@@ -37,7 +37,7 @@ module Gitlab
       end
     end
-    def initialize(rails_env=nil)
+    def initialize(rails_env = nil)
       @rails_env = rails_env || ::Rails.env
     end

spec/config/mail_room_spec.rb

@@ -7,7 +7,7 @@ describe 'mail_room.yml' do
   context 'when incoming email is disabled' do
     before do
       ENV['MAIL_ROOM_GITLAB_CONFIG_FILE'] = Rails.root.join('spec/fixtures/mail_room_disabled.yml').to_s
-      Gitlab::MailRoom.reload_config!
+      Gitlab::MailRoom.reset_config!
     end
     after do
@@ -22,7 +22,7 @@ describe 'mail_room.yml' do
   context 'when incoming email is enabled' do
     before do
       ENV['MAIL_ROOM_GITLAB_CONFIG_FILE'] = Rails.root.join('spec/fixtures/mail_room_enabled.yml').to_s
-      Gitlab::MailRoom.reload_config!
+      Gitlab::MailRoom.reset_config!
     end
     after do