Move obsoleted test/thread/test_*.rb with the current implementation.

* test/ruby/test_thread_{cv,queue}.rb: Move under the test/ruby directory.
    and rename TestThread* from Test*.
  * test/test_sync.rb: Move toplevel of test diretory because sync is still
    standard library.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64137 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_thread_cv.rb

@@ -2,7 +2,7 @@
 require 'test/unit'
 require 'tmpdir'
 
-class TestConditionVariable < Test::Unit::TestCase
+class TestThreadConditionVariable < Test::Unit::TestCase
   ConditionVariable = Thread::ConditionVariable
   Mutex = Thread::Mutex
 

test/ruby/test_thread_queue.rb

@@ -3,7 +3,7 @@ require 'test/unit'
 require 'tmpdir'
 require 'timeout'
 
-class TestQueue < Test::Unit::TestCase
+class TestThreadQueue < Test::Unit::TestCase
   Queue = Thread::Queue
   SizedQueue = Thread::SizedQueue