Merge branch 'test_env_cache' into 'master'

Disabling cache for test environment



See merge request !1807

config/environments/test.rb

@@ -30,4 +30,6 @@ Gitlab::Application.configure do
   config.active_support.deprecation = :stderr
 
   config.eager_load = false
+
+  config.cache_store = :null_store
 end

config/initializers/session_store.rb

@@ -9,7 +9,8 @@ begin
 rescue
 end
 
-Gitlab::Application.config.session_store(
+unless Rails.env.test?
+  Gitlab::Application.config.session_store(
     :redis_store, # Using the cookie_store would enable session replay attacks.
     servers: Gitlab::Application.config.cache_store[1].merge(namespace: 'session:gitlab'), # re-use the Redis config from the Rails cache store
     key: '_gitlab_session',
@@ -17,4 +18,5 @@ Gitlab::Application.config.session_store(
     httponly: true,
     expire_after: Settings.gitlab['session_expire_delay'] * 60,
     path: (Gitlab::Application.config.relative_url_root.nil?) ? '/' : Gitlab::Application.config.relative_url_root
-)
+  )
+end