resolving issue #19

[iennae]

Description

• fix gpg path generation so that we don't have to update with each new version of OS.

  Issues Resolved

• Issue #19

  Check List

• [ ] All tests pass. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/TESTING.MD
• [ ] New functionality includes testing.
• [ ] New functionality has been documented in the README if applicable
• [ ] The CLA has been signed. See https://github.com/chef-cookbooks/community_cookbook_documentation/blob/master/CONTRIBUTING.MD