Merge pull request puppetlabs#5017 from branan/cherry_pick_pr_5016

(maint) Use correct local variable name

Author: Kylo Ginsberg

lib/puppet/util/plist.rb

@@ -45,7 +45,7 @@ def read_plist_file(file_path)
                                                   {:failonfail => true, :combine => true})
           return parse_plist(plist)
         rescue Puppet::ExecutionFailure => detail
-          Puppet.warning("Cannot read file #{path}; Puppet is skipping it.\n" + "Details: #{detail}")
+          Puppet.warning("Cannot read file #{file_path}; Puppet is skipping it.\n" + "Details: #{detail}")
         end
       end
     end