tests: increase timeout in Face/TestWebSocketChannel/MultipleAccepts

prevents test case failure on Ubuntu 17.04

refs #4002

Change-Id: I379499eaa90f12137b8c31b4a4fbe16392780a7d
diff --git a/tests/daemon/face/websocket-channel.t.cpp b/tests/daemon/face/websocket-channel.t.cpp
index 57e70f5..8c1f6c8 100644
--- a/tests/daemon/face/websocket-channel.t.cpp
+++ b/tests/daemon/face/websocket-channel.t.cpp
@@ -202,7 +202,7 @@
   this->clientConnect(client3);
 
   BOOST_CHECK_EQUAL(limitedIo.run(4, // 2 listenerOnFaceCreated, 2 clientHandleOpen
-                    time::seconds(1)), LimitedIo::EXCEED_OPS);
+                    time::seconds(2)), LimitedIo::EXCEED_OPS);
   BOOST_CHECK_EQUAL(listenerChannel->size(), 3);
 
   // check face persistency