Add title, description, code, and source_location to example metadata

[vjeffrey]

[arlimus]

Could we use :desc instead of :descr?

[chris-rock]

@vjeffrey +1 I like that implementation. Could we cover the title, desc in a separate object:

{
    ...
   metadata : {
      title: "abc",
      desc: ""
  }
}

[arlimus]

Great point @chris-rock , let's move to a clean separate JSON format that combines inspec's fields and rspec's data to a proper report structure.

[arlimus]

For now: flatten it out until we have another json reporter. Please don't use these fields here, they will go away!

[arlimus]

Please not that this has been superseded by #552