tests: test IP transports under various combos of address family/scope

In particular, link-local addresses are now tested as well.

Additionally, WebSocketTransport send/receive tests are extended
to check transport counters.

Change-Id: I5b35f498a5d8d70cb1f7a2bea3ce99d22370e050
Refs: #1428
diff --git a/tests/daemon/face/tcp-transport-fixture.hpp b/tests/daemon/face/tcp-transport-fixture.hpp
index b792e9c..face839 100644
--- a/tests/daemon/face/tcp-transport-fixture.hpp
+++ b/tests/daemon/face/tcp-transport-fixture.hpp
@@ -30,7 +30,6 @@
 #include "face/face.hpp"
 
 #include "dummy-receive-link-service.hpp"
-#include "test-netif-ip.hpp"
 #include "tests/limited-io.hpp"
 
 namespace nfd {
@@ -74,7 +73,7 @@
   }
 
   void
-  initialize(ip::address address = ip::address_v4::loopback(),
+  initialize(ip::address address,
              ndn::nfd::FacePersistency persistency = ndn::nfd::FACE_PERSISTENCY_PERSISTENT)
   {
     tcp::endpoint remoteEp(address, 7070);