Revert "jdk6u27 and jdk7u13"
Revert "jdk6u27 and jdk7u13"

This reverts commit 7013882ead40dcc4eacf918fc09912a1e78eabb2.

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