Chef 13 was released today and seems to no longer be able to handle resource
classes from LWRP providers in the same way.

```
   ================================================================================
   Error executing action `install` on resource 'sumologic_collector[Install Sumo Logic collector]'
   ================================================================================

   NameError
   ---------
   uninitialized constant Chef::Resource::SumologicCollector

   Cookbook Trace:
   ---------------
   /tmp/kitchen/cache/cookbooks/sumologic-collector/providers/default.rb:10:in `load_current_resource'
```

This change is now documented under "DSL-based custom resources and providers
no longer get module constants" [here](https://docs.chef.io/release_notes.html).