Skip JSON test suite tests

Author: jhawthorn

Rakefile

@@ -6,7 +6,7 @@ require "rake/testtask"
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
-  t.test_files = FileList["test/**/test_*.rb"]
+  t.test_files = FileList["test/**/test_*.rb"].grep_v(/\/JSONTestSuite\//i)
 end
 
 require "rake/extensiontask"