tools: switch to Face::getIoContext()

Change-Id: I6be4c682d62e1061af45052d2141b9e5b9e897c5
diff --git a/tests/daemon/mgmt/rib-manager.t.cpp b/tests/daemon/mgmt/rib-manager.t.cpp
index 417500e..ded13e2 100644
--- a/tests/daemon/mgmt/rib-manager.t.cpp
+++ b/tests/daemon/mgmt/rib-manager.t.cpp
@@ -185,7 +185,7 @@
       data->setContent(resp.wireEncode());
       m_keyChain.sign(*data, ndn::security::SigningInfo(ndn::security::SigningInfo::SIGNER_TYPE_SHA256));
 
-      boost::asio::post(m_face.getIoService(), [this, data] { m_face.receive(*data); });
+      boost::asio::post(m_face.getIoContext(), [this, data] { m_face.receive(*data); });
     };
 
     const Name commandPrefix("/localhost/nfd/fib/add-nexthop");