Change rejected routes error message to verbose logging

Instead of printing an error message when a route is invalid,
print a log error with verbose loglevel.

Fixes: rhbz#1491717

Remove wrongly imported library

Fix import format

Author: imcsk8

Diff for: pkg/router/controller/host_admitter.go

@@ -123,7 +123,7 @@ func (p *HostAdmitter) HandleEndpoints(eventType watch.EventType, endpoints *kap
 // HandleRoute processes watch events on the Route resource.
 func (p *HostAdmitter) HandleRoute(eventType watch.EventType, route *routeapi.Route) error {
 	if err := p.admitter(route); err != nil {
-		glog.Errorf("Route %s not admitted: %s", routeNameKey(route), err.Error())
+		glog.V(4).Infof("Route %s not admitted: %s", routeNameKey(route), err.Error())
 		p.recorder.RecordRouteRejection(route, "RouteNotAdmitted", err.Error())
 		return err
 	}