Fixed auth test for the local auth exception in 2.8

Author: christkv

lib/db.js

@@ -992,7 +992,6 @@ var Db = function(databaseName, topology, options) {
    */
   this.authenticate = function(username, password, options, callback) {
     if(typeof options == 'function') callback = options, options = {};
-    // console.log("---------------------------------------- AUTH 0 :: " + options.authMechanism)
     // Set default mechanism
     if(!options.authMechanism) {
       options.authMechanism = 'MONGODB-CR';
@@ -1020,21 +1019,15 @@ var Db = function(databaseName, topology, options) {
       handleCallback(callback, err, result);
     }
 
-    // console.log("---------------------------------------- AUTH :: " + options.authMechanism)
-
     // authMechanism
     var authMechanism = options.authMechanism || '';
     authMechanism = authMechanism.toUpperCase();
 
     // If classic auth delegate to auth command
     if(authMechanism == 'MONGODB-CR') {
-      topology.auth('scram-sha-1', authdb, username, password, function(err, result) {
-        if(err == null && result == true) return _callback(null, true);
-
-        topology.auth('mongocr', authdb, username, password, function(err, result) {
-          if(err) return handleCallback(callback, err, false);
-          _callback(null, true);
-        });
+      topology.auth('mongocr', authdb, username, password, function(err, result) {
+        if(err) return handleCallback(callback, err, false);
+        _callback(null, true);
       });
     } else if(authMechanism == 'PLAIN') {
       topology.auth('plain', authdb, username, password, function(err, result) {