Fixes #14 Update node attributes to strings and use use_inline_resources if it is available

Fix for #14 

Changed attribute references to strings and added a conditional use_inline_resources which appeased foodcritic.
The question is, will using inline resources foul up the notification on old lines 29 and 37? 

If so, I wonder if we could somehow auto-declare this notification in on the forwarder_monitors resource (thus removing people from the need to declare it themselves, and avoid the question of if inline resources is fouling up things or not). 

Additionally, we could make this a wrapper of the app HWRP that you made as well, and cut down the duplication of resources :grin: