Add rubygems_url parameter to omnibus_service
Add rubygems_url parameter to omnibus_service

This resource also calls the same library helper so it needs this set.

Signed-off-by: Lance Albertson <3161cdc7bf197e4c3a35b9cbe358c79910f27e90@osuosl.org>

chef-cookbooks/chef-ingredient,chef-cookbooks/chef-ingredient