Merge pull request #331 from ccutrer/bundle_update

speed up acceptance tests

Author: rafaelfranca

test/acceptance/helper.rb

@@ -238,7 +238,7 @@ def run!(command, options = {})
 
       def bundle
         run! "(gem list bundler | grep bundler) || gem install bundler", timeout: nil, retry: 2
-        run! "bundle update --retry=2", timeout: nil
+        run! "bundle check || bundle update --retry=2", timeout: nil
       end
 
       private