add gitreview and fix foodcritic test

Change-Id: Ie37af273054a366316d3e09f859ba5032affaabd
Enable VMS and LibvirtKVM collectors.

Update the default attributes to build version 3.3.476. This version is coupled
with a specific git commit which provides said collectors, plus fixes. Slightly
tweak the install recipe.

Added spec dir with a trivial chefspec test

Change-Id: Ib9a96a0167c098d43b8b489c40bc7db3eebd3e85