[VOL-2565]OpenOLT adapter ignores the log-level

Change-Id: Ic1466903f6270721e401516f0a3a984ea2a21f3c
diff --git a/main.go b/main.go
index 97f6ca3..332634e 100644
--- a/main.go
+++ b/main.go
@@ -452,6 +452,8 @@
 		log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
 	}
 
+	log.SetAllLogLevel(loglevel)
+
 	defer log.CleanUp()
 
 	// Print version / build information and exit