updated latest and default jdk versions
updated latest and default jdk versions

pwalczak/testagapw,jcf/heroku-buildpack-jvm-common,Scalingo/jvm-common-buildpack,jcf/heroku-buildpack-jvm-common,heroku/heroku-buildpack-jvm-common,heroku/heroku-buildpack-jvm-common,Scalingo/jvm-common-buildpack,pwalczak/testagapw