Normalizing two test declarations.

These tests both involve dynamic un-rooted classes. As such, they have
no name and thus print like #<Class:0xXXXXXXXX:...>. I switched one to
a describe instead of Class.new(Minitest::Test) and the other I
stringified the anonymous class.

Signed-off-by: Ryan Davis <zenspider@chef.io>

test/unit/fetchers/fetchers_test.rb

@@ -5,7 +5,7 @@ require 'helper'
 require 'bundles/inspec-supermarket/target'
 require 'bundles/inspec-supermarket/api'
 
-describe Inspec::Fetcher do
+describe "Inspec::Fetcher" do
   it 'loads the local fetcher for this file' do
     res = Inspec::Fetcher.resolve(__FILE__)
     res.must_be_kind_of Fetchers::Local

test/unit/plugin/v2/api_dsl_test.rb

@@ -14,7 +14,7 @@ module DslUnitTests
     :resource_dsl,
   ].each do |plugin_type_under_test|
 
-    Class.new(Minitest::Test) do
+    describe plugin_type_under_test do
       # Assign name to anonymous class, so test output is meaningful
       Object.const_set(plugin_type_under_test.to_s.upcase + '_UnitTests', self)