Added custom env var to point to the deployment artifact (i.e. jar file) so that the java-buildpack doesn't need to know where the main-class jar file lives and so that it doesn't have to be on the path.
Added custom env var to point to the deployment artifact (i.e. jar file) so that the java-buildpack doesn't need to know where the main-class jar file lives and so that it doesn't have to be on the path.

garfieldsam/r-java-buildpack-bew,garfieldsam/r-java-buildpack-fixed,pivotalservices/java-r-buildpack,pivotalservices/java-r-buildpack,pivotalservices/java-r-buildpack,PvanHengel/java-r-buildpack,PvanHengel/java-r-buildpack,garfieldsam/r-java-buildpack-fixed,garfieldsam/r-java-buildpack-fixed,garfieldsam/r-java-buildpack-bew,pivotalservices/java-r-buildpack,garfieldsam/r-java-buildpack-fixed,PvanHengel/java-r-buildpack,garfieldsam/r-java-buildpack-bew,PvanHengel/java-r-buildpack,garfieldsam/r-java-buildpack-bew