specify exact jfryman-nginx puppet module version to install

This fixes an issue with using the latest version of the jfryman-nginx puppet module.

A little under a month ago, development work on the jfryman-nginx puppet module led to an issue where config parameters weren't getting passed into the base nginx config (see https://github.com/jfryman/puppet-nginx/issues/460); this fixes that by using jfryman's recommended solution, specifying the exact version (0.0.10) to use for now.