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.
I thought about that, but the validations that you do in the splunk_template provider are not present in the HWRP. I am not sure whether use_inline_resources would trip up the service restart, I will try and test that out. If it is causing issues, I will look into declaring that in the resource.