tests: UnicastUdpTransport test suite improvements

Fixed m_hasBeenUsedRecently uninitialized in DatagramTransport

refs #3307

Change-Id: I786a84009d9cf01e0bb211c872d4375f46c747fd
diff --git a/tests/daemon/face/unix-stream-transport-fixture.hpp b/tests/daemon/face/unix-stream-transport-fixture.hpp
index 86c8af0..38c9b5f 100644
--- a/tests/daemon/face/unix-stream-transport-fixture.hpp
+++ b/tests/daemon/face/unix-stream-transport-fixture.hpp
@@ -30,8 +30,6 @@
 #include "face/lp-face.hpp"
 
 #include "dummy-receive-link-service.hpp"
-#include "transport-test-common.hpp"
-
 #include "tests/limited-io.hpp"
 
 #include <boost/filesystem.hpp>
@@ -124,7 +122,7 @@
           BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
         }
       });
-    limitedIo.defer(time::milliseconds(50));
+    limitedIo.defer(time::seconds(1));
   }
 
 protected:
@@ -143,4 +141,4 @@
 } // namespace face
 } // namespace nfd
 
-#endif // NFD_TESTS_DAEMON_FACE_UNIX_STREAM_TRANSPORT_FIXTURE_HPP
\ No newline at end of file
+#endif // NFD_TESTS_DAEMON_FACE_UNIX_STREAM_TRANSPORT_FIXTURE_HPP