add metricsFactory to toLogValue()

Author: abbeyqy

src/main/java/com/arpnetworking/tsdcore/sinks/HttpSinkActor.java

@@ -117,6 +117,7 @@ public Object toLogValue() {
                 .put("waiting", _waiting)
                 .put("inflightRequestsCount", _inflightRequestsCount)
                 .put("pendingRequestsCount", _pendingRequests.size())
+                .put("metricsFactory", _metricsFactory)
                 .build();
     }