Updated groovy version to fix build of zuul-simple-webapp
Updated groovy version to fix build of zuul-simple-webapp

jsebastian/zuul,jaume-pinyol/zuul,mattnelson/zuul,mattnelson/zuul,kenschneider18/zuul,kenschneider18/zuul,jaume-pinyol/zuul,jsebastian/zuul