Set path to system ruby in an attribute so that it can be overriden

[pghalliday]

Description

Allows users to override the system ruby path if ruby is installed into a non standard location and Chef has been installed without an embedded ruby (eg. from the Gem)

Issues Resolved

18

Check List

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

[lamont-granquist]

@tas50 @iennae you should probably just hit merge on this

[iennae]

Thanks @lamont-granquist for the feedback! Thanks @pghalliday for the contribution!

[pghalliday]

Thanks :)