Remove global locking in gossip logging

In go-logging there is a concurrency related bug (it's not thread safe).
Before 5f9f6a9
was merged, we fixed our logger locally using this nasty global lock.

I'm removing this global lock now because it causes contention and isn't
necessary. Better 3 months late than never...

Change-Id: I1d1b1530f1ef47258e35297d708b8397be472856
Signed-off-by: Yacov Manevich <yacovm@il.ibm.com>

gossip/util/logging.go

@@ -24,7 +24,6 @@ import (
 	"sync"
 
 	"github.com/op/go-logging"
-
 	"google.golang.org/grpc/grpclog"
 )
 
@@ -50,7 +49,7 @@ func init() {
 }
 
 type Logger struct {
-	logger logging.Logger
+	logging.Logger
 	module string
 }
 
@@ -86,105 +85,8 @@ func GetLogger(module string, peerId string) *Logger {
 	}
 	logging.SetLevel(lvl, module)
 	lgr := &Logger{}
-	lgr.logger = *logging.MustGetLogger(module)
-	lgr.logger.ExtraCalldepth++
+	lgr.Logger = *logging.MustGetLogger(module)
 	lgr.module = module
 	loggersByModules[module] = lgr
 	return lgr
 }
-
-func (l *Logger) Fatal(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Fatal(args)
-}
-
-func (l *Logger) Fatalf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Fatalf(format, args)
-}
-
-func (l *Logger) Panic(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Panic(args)
-}
-
-func (l *Logger) Panicf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Panicf(format, args)
-}
-
-func (l *Logger) Critical(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Critical(args)
-}
-
-func (l *Logger) Criticalf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Criticalf(format, args)
-}
-
-func (l *Logger) Error(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Error(args)
-}
-
-func (l *Logger) Errorf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Errorf(format, args)
-}
-
-func (l *Logger) Warning(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Warning(args)
-}
-
-func (l *Logger) Warningf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Warningf(format, args)
-}
-
-func (l *Logger) Notice(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Notice(args)
-}
-
-func (l *Logger) Noticef(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Noticef(format, args)
-}
-
-func (l *Logger) Info(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Info(args)
-}
-
-func (l *Logger) Infof(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Infof(format, args)
-}
-
-func (l *Logger) Debug(args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Debug(args)
-}
-
-func (l *Logger) Debugf(format string, args ...interface{}) {
-	lock.Lock()
-	defer lock.Unlock()
-	l.logger.Debugf(format, args)
-}