(MODULES-3195) Fix WOW64 Constant Definition
(MODULES-3195) Fix WOW64 Constant Definition

The module is throwing a "Munging failed" error when applying a registry
value, more specifically with 64 bit keys/values.  The recommended way to
fix this is to remove the "unless defined?" so that the constant is always
defined on this module.

zshahan/puppetlabs-registry