New Node.js Cartridge+ agent extension

This PR will remove the existing nodejs puppet module. It uses the puppet labs node.js puppet module (https://forge.puppetlabs.com/puppetlabs/nodejs) instead. To install nodejs puppet module, you need to execute the command 'puppet module install puppetlabs-nodejs' in puppet master side which will download and copy the nodejs puppet module and dependencies(stdlib, apt) to /etc/puppet/modules. 

Instead you can use the https://github.com/R-Rajkumar/puppetforge script by Raj which installs external puppet modules by including the 'puppet module install puppetlabs-nodejs' in the puppetforge.modules file and executing the puppetforge.sh script.