Update to handle latest Play 2.2 Version

Prior to 2.2 the Unix script to execute Play was named start and it resided in the root level folder of the distribution. With 2.2 the start script is named as per the project’s name and it resides in the distribution’s bin folder. This update to play2-openshift-quickstart includes changes to handle this correctly for Play versions 2.0 through 2.2.