VOL-1848 API for setting and querying loglevel of api-server;
Add source-router to support routing UpdateLogLevel to cores;
Add logging endpoints to rocore

Change-Id: I89eea3599ea3006fe92e6917221cd1fd235ec5e4
diff --git a/afrouter/afrouter/cluster.go b/afrouter/afrouter/cluster.go
index e33db67..7fc581b 100644
--- a/afrouter/afrouter/cluster.go
+++ b/afrouter/afrouter/cluster.go
@@ -157,6 +157,7 @@
 	if err := src.RecvMsg(f); err != nil {
 		return nil, err
 	}
+	log.Debugf("Assigned backend %s", f.backend.name)
 	// Check that the backend was routable and actually has connections open.
 	// If it doesn't then return a nil backend to indicate this
 	if f.backend == nil {