face: replace EventEmitter usage with Signal

refs #2300

Change-Id: I17d0d65d2c474b17dd9f23f271a6144b0b4fbc07
diff --git a/tests/daemon/mgmt/strategy-choice-publisher.cpp b/tests/daemon/mgmt/strategy-choice-publisher.cpp
index e85bc4a..e747c38 100644
--- a/tests/daemon/mgmt/strategy-choice-publisher.cpp
+++ b/tests/daemon/mgmt/strategy-choice-publisher.cpp
@@ -153,8 +153,7 @@
   m_expectedEntries["/test/a"] = expectedEntryA;
   m_expectedEntries["/test/b"] = expectedEntryB;
 
-  m_face->onReceiveData +=
-    bind(&StrategyChoicePublisherFixture::validatePublish, this, _1);
+  m_face->onReceiveData.connect(bind(&StrategyChoicePublisherFixture::validatePublish, this, _1));
 
   m_publisher.publish();
   BOOST_REQUIRE(m_finished);