修复RpcServerTest bug，boost线程池默认线程数为0

Cpp/Platform/Rpc/RpcCommunicatorTest.cc

@@ -164,6 +164,8 @@ TEST_F(RpcCommunicatorTest, SendAndRecvString)
 {
 	boost::threadpool::fifo_pool threadPool(2);
 	threadPool.schedule(boost::bind(&RpcServerTest::Start, &rpcServer));
+
+	boost::this_thread::sleep(boost::posix_time::milliseconds(100));
 	threadPool.schedule(boost::bind(&RpcClientTest::Start, &rpcClient));
 	barrier.Wait();
 	threadPool.wait();

Cpp/Platform/Rpc/RpcServer.cc

@@ -14,7 +14,7 @@ namespace Egametang {
 
 RpcServer::RpcServer(boost::asio::io_service& service, int port):
 		ioService(service), acceptor(ioService),
-		threadPool(), sessions(),
+		threadPool(1), sessions(),
 		methods()
 {
 	boost::asio::ip::address address;

Cpp/Platform/Rpc/RpcServerTest.cc

@@ -82,6 +82,8 @@ TEST_F(RpcServerTest, ClientAndServer)
 
 	// server和client分别在两个不同的线程
 	threadPool.schedule(boost::bind(&IOServiceRun, &ioServer));
+	// 等待server OK
+	boost::this_thread::sleep(boost::posix_time::milliseconds(100));
 	threadPool.schedule(boost::bind(&IOServiceRun, &ioClient));
 
 	CountBarrier barrier;

Cpp/Platform/Thread/CountBarrierTest.cc

@@ -28,10 +28,7 @@ public:
 	}
 	void Signal(CountBarrier& barrier)
 	{
-		boost::xtime xt;
-		boost::xtime_get(&xt, boost::TIME_UTC);
-		xt.sec += 1;
-		boost::thread::sleep(xt);
+		boost::this_thread::sleep(boost::posix_time::milliseconds(1000));
 		++count;
 		barrier.Signal();
 	}