test: basic unit-test for WebSocket face

Change-Id: I41dcc2ecff57225db1aff8e359d507f0e89d4c96
Refs: #1553
diff --git a/daemon/face/websocket-channel.cpp b/daemon/face/websocket-channel.cpp
index 5cf98f6..234faff 100644
--- a/daemon/face/websocket-channel.cpp
+++ b/daemon/face/websocket-channel.cpp
@@ -44,6 +44,8 @@
   m_server.set_open_handler(bind(&WebSocketChannel::handleOpen, this, _1));
   m_server.set_close_handler(bind(&WebSocketChannel::handleClose, this, _1));
   m_server.init_asio(&getGlobalIoService());
+  // Always set SO_REUSEADDR flag
+  m_server.set_reuse_addr(true);
 
   this->setUri(FaceUri(localEndpoint, "ws"));
 }