proposal upgrade node

node LTS upgrade support, drop node 0.10 support by default

Background

We have had Node4 (and 5) support for a bit now, but have been retaining node 0.10 support due to our original deployment configurations. The project would be well served taking advantage of the massive efficiencies of a default install using the LTS version of NodeJS (and the inherent capability of profiling), both for our initial VM based deployment, and for Docker based deployments

Goals

• drop node 0.10 support as a testing and deployment scenario
• update the RackHD vagrant images and packer deployment roles with Ansible to use Node4 packages
• update the documentation to reflect installation of Node LTS
• add documentation to the developer's guide on how to run profiling, taking advantage of Node4 profiling capabilities

API