use UDPSocket as older JRuby 1.7.x seems to have a bug

Author: kares

src/test/ruby/ssl/test_socket.rb

@@ -56,7 +56,7 @@ def test_sync_close_without_connect
       end
     else
       begin
-        socket = Socket.new :INET, :STREAM
+        socket = UDPSocket.new :INET
         assert ! socket.closed?
         ssl = OpenSSL::SSL::SSLSocket.new(socket)
         ssl.sync_close = true