Add node 4.5.0, remove node 4.4.7
Add node 4.5.0, remove node 4.4.7

source url: https://nodejs.org/dist/v4.5.0/node-v4.5.0.tar.gz, source sha256: 74ced83b8d890d90e2a8b0d54b0d0e9b5e01d6fd6148cec6e9911ff6eaf0cf21

[#128431641]

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