More logs cleanup

Change-Id: I5129e833d648e871a6c9719caf145f4da477ee19
diff --git a/common/logger/logger.go b/common/logger/logger.go
index cf391bf..5830e3b 100644
--- a/common/logger/logger.go
+++ b/common/logger/logger.go
@@ -17,8 +17,6 @@
 package logger
 
 import (
-	"fmt"
-
 	lkh "github.com/gfremex/logrus-kafka-hook"
 	log "github.com/sirupsen/logrus"
 )
@@ -77,25 +75,25 @@
 }
 
 func Panic(msg string, args ...interface{}) {
-	myLogger.Panic(fmt.Sprintf(msg, args...))
+	myLogger.Panicf(msg, args...)
 }
 
 func Fatal(msg string, args ...interface{}) {
-	myLogger.Fatal(fmt.Sprintf(msg, args...))
+	myLogger.Fatalf(msg, args...)
 }
 
 func Error(msg string, args ...interface{}) {
-	myLogger.Error(fmt.Sprintf(msg, args...))
+	myLogger.Errorf(msg, args...)
 }
 
 func Warn(msg string, args ...interface{}) {
-	myLogger.Warn(fmt.Sprintf(msg, args...))
+	myLogger.Warnf(msg, args...)
 }
 
 func Info(msg string, args ...interface{}) {
-	myLogger.Info(fmt.Sprintf(msg, args...))
+	myLogger.Infof(msg, args...)
 }
 
 func Debug(msg string, args ...interface{}) {
-	myLogger.Debug(fmt.Sprintf(msg, args...))
+	myLogger.Debugf(msg, args...)
 }
diff --git a/common/utils/utils.go b/common/utils/utils.go
index f532d51..f36cae4 100644
--- a/common/utils/utils.go
+++ b/common/utils/utils.go
@@ -38,7 +38,7 @@
 		return logger.GetLogger()
 	}
 
-	return logger.WithFields(log.Fields{
+	return logger.GetLogger().WithFields(log.Fields{
 		"serial_number": OnuToSn(onu),
 		"interfaceId":   onu.IntfID,
 		"onuId":         onu.OnuID,