Clean up Chefspec resource cloning warnings

[mikelococo]

There are currently lots of resource cloning warnings cluttering up the chefspec output, it would be handy to clean at least some of them up. At least a few are genuine warning about cloned resources in this cookbook, but most are from upstream cookbooks... which means we can't fix them here. Probably this means, fix our cloned resources and attempt to filter the remaining ones out of the chefspec output in Guard.

For background on resource cloning:
https://tickets.opscode.com/browse/CHEF-3694
http://scottwb.com/blog/2014/01/24/defeating-the-infamous-chef-3694-warning/