Use git rack-cache, less verbose.

Gemfile

@@ -14,7 +14,7 @@ gem 'unicorn'
 gem 'sentry-raven',    github: 'getsentry/raven-ruby'
 gem 'yard-sinatra',    github: 'rkh/yard-sinatra'
 gem 'rack-contrib',    github: 'rack/rack-contrib'
-gem 'rack-cache',      '~> 1.2'
+gem 'rack-cache',      github: 'rtomayko/rack-cache'
 gem 'rack-attack'
 gem 'gh'
 gem 'bunny',           '~> 0.8.0'

Gemfile.lock

@@ -37,6 +37,13 @@ GIT
     metriks-librato_metrics (0.0)
       metriks (>= 0.9.9.6)
 
+GIT
+  remote: git://github.com/rtomayko/rack-cache.git
+  revision: d00e6e491fcc7bdca9c27d735abde5c4fdb48cd9
+  specs:
+    rack-cache (1.2)
+      rack (>= 0.4)
+
 GIT
   remote: git://github.com/travis-ci/travis-core.git
   revision: a3fad94eca3c75e225050378a855f435854eb6ef
@@ -210,8 +217,6 @@ GEM
     rack (1.4.5)
     rack-attack (2.3.0)
       rack
-    rack-cache (1.2)
-      rack (>= 0.4)
     rack-protection (1.5.1)
       rack
     rack-ssl (1.3.4)
@@ -314,7 +319,7 @@ DEPENDENCIES
   mocha (~> 0.12)
   pry
   rack-attack
-  rack-cache (~> 1.2)
+  rack-cache!
   rack-contrib!
   rake (~> 0.9.2)
   rb-fsevent (~> 0.9.1)

lib/travis/api/app.rb

@@ -112,7 +112,6 @@ module Travis::Api
         memcache_servers = ENV['MEMCACHIER_SERVERS']
         if Travis::Features.feature_active?(:use_rack_cache) && memcache_servers
           use Rack::Cache,
-            verbose: true,
             metastore:   "memcached://#{memcache_servers}/meta-#{Travis::Api::App.deploy_sha}",
             entitystore: "memcached://#{memcache_servers}/body-#{Travis::Api::App.deploy_sha}"
         end