Add node 4.7.2, remove node 4.7.1
Add node 4.7.2, remove node 4.7.1

source url: https://nodejs.org/dist/v4.7.2/node-v4.7.2.tar.gz
source sha256: 771e9f4ef946f8f13452039c5bd1eb3edb9e4a0937b7a5f328dbd8e529a09284

[#137135283]

ekaranto/rails4-bluemix-buildpack,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack,jumptvs/BP_Ruby,ekaranto/rails4-bluemix-buildpack,cloudfoundry/ruby-buildpack,ekaranto/rails4-bluemix-buildpack,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack