(maint) Remove resources_spec.rb Facter stubs

 - Facter stubs would actually cause different types to be created
   on Windows that would break tests.
 - Instead of creating stubs that affect a number of tests, carefully
   select the uid in the one test that needs to be particular about max
   UID
Merge pull request #2785 from Iristyle/maint/master/PUP-2454-uid-fix-Windows

(maint) Remove resources_spec.rb Facter stubs