Updating the guide to test the sample app
Updating the guide to test the sample app

This commit will resolve the problem stated in https://www.pivotaltracker.com/story/show/88965078
TimGerlach/docs-buildpacks,dantwining/docs-buildpacks,cwest/docs-buildpacks,bridgetkromhout/docs-buildpacks,cloudfoundry/docs-buildpacks,afeld/docs-buildpacks