Make mail_room idle_timeout option configurable.

config/gitlab.yml.example

@@ -138,6 +138,8 @@ production: &base
 
     # The mailbox where incoming mail will end up. Usually "inbox".
     mailbox: "inbox"
+    # The mailbox where incoming mail will end up. Usually "inbox".
+    idle_timeout: 60
 
   ## Build Artifacts
   artifacts:

config/mail_room.yml

@@ -15,7 +15,7 @@
       :start_tls: <%= config[:start_tls].to_json %>
       :email: <%= config[:user].to_json %>
       :password: <%= config[:password].to_json %>
-      :idle_timeout: 60
+      :idle_timeout: <%= config[:idle_timeout].to_json %>
 
       :name: <%= config[:mailbox].to_json %>
 

lib/gitlab/mail_room.rb

@@ -31,6 +31,7 @@ module Gitlab
         config[:ssl] = false if config[:ssl].nil?
         config[:start_tls] = false if config[:start_tls].nil?
         config[:mailbox] = 'inbox' if config[:mailbox].nil?
+        config[:idle_timeout] = 60 if config[:idle_timeout].nil?
 
         if config[:enabled] && config[:address]
           gitlab_redis = Gitlab::Redis.new(rails_env)

spec/config/mail_room_spec.rb

@@ -47,6 +47,7 @@ describe 'mail_room.yml' do
       expect(mailbox[:email]).to eq('gitlab-incoming@gmail.com')
       expect(mailbox[:password]).to eq('[REDACTED]')
       expect(mailbox[:name]).to eq('inbox')
+      expect(mailbox[:idle_timeout]).to eq(60)
 
       redis_url = gitlab_redis.url
       sentinels = gitlab_redis.sentinels