Updated log level to v2 for sysctlFSFileMax.

This is very importatnt log for trouble-shooting, we should update
it to v2 by default.

internal/ingress/controller/nginx.go

@@ -551,7 +551,7 @@ func (n *NGINXController) OnUpdate(ingressCfg ingress.Configuration) error {
 		wp = 1
 	}
 	maxOpenFiles := (sysctlFSFileMax() / wp) - 1024
-	glog.V(3).Infof("maximum number of open file descriptors : %v", maxOpenFiles)
+	glog.V(2).Infof("maximum number of open file descriptors : %v", maxOpenFiles)
 	if maxOpenFiles < 1024 {
 		// this means the value of RLIMIT_NOFILE is too low.
 		maxOpenFiles = 1024

internal/ingress/controller/util.go

@@ -61,6 +61,6 @@ func sysctlFSFileMax() int {
 		// returning 0 means don't render the value
 		return 0
 	}
-	glog.V(3).Infof("system fs.file-max=%v", fileMax)
+	glog.V(2).Infof("system fs.file-max=%v", fileMax)
 	return fileMax
 }