add oracle env variables
add oracle env variables

source: https://github.com/cloudfoundry/nodejs-buildpack/issues/65
NSWIDER/nodejs-oracle-buildpack,NSWIDER/nodejs-oracle-buildpack,NSWIDER/nodejs-oracle-buildpack,karthikeyabhaghavatula/nodejs_buildpack,karthikeyabhaghavatula/nodejs_buildpack,karthikeyabhaghavatula/nodejs_buildpack