title: Configuring DataSource.groovy for Openshift for Grails
body: <p>I'm trying to deploy a Grails application on Openshift.
  I'm deploying the app using a locally built war file. 
  Right now, I am using the url given by the rhc-app-show command in the DataSource.groovy file for my Database configurations.
  Whenever I try with the environment variables of Openshift (eg. $OPENSHIFT_MYSQL_DB_HOST), it crashes. Any idea or pointers on how to use those in the config file?</p>
  
  <p>Thanks.</p>