Bugfix: replace log by logger

Author: Aitor Magán García

lib/dbCluster.js

@@ -74,10 +74,10 @@ Monitor.prototype.start = function(){
 
   self.monitor = setInterval(function(){
     if(!self.database.connected()){
-      log.info({ opType: 'MONITOR', msg: 'disconnected' });
+      logger.info({ opType: 'MONITOR', msg: 'disconnected' });
       self.emit('disconnected');
     } else {
-      log.info({ opType: 'MONITOR', msg: 'connected' });
+      logger.info({ opType: 'MONITOR', msg: 'connected' });
       self.emit('connected');
     }
   }, 3000);
@@ -97,8 +97,6 @@ Monitor.prototype.restart = function(database){
   this.start();
 };
 
-logger.prefix = path.basename(module.filename, '.js');
-
 var dbMaster;
 var blockingDb;
 var sentinels = [];