fix tests in Firefox

test/util.http.js

@@ -16,7 +16,7 @@ describe('http utils', function() {
       send: function() {
         var self = this;
         setTimeout(function() {
-          self.response = 'test';
+          self.response = [1,2,3,4];
           self.error ? self.onerror() : self.onload();
         }, 10);
       },

test/util.log.js

@@ -21,7 +21,7 @@ describe('log utils', function() {
     log.warn('hola');
 
     var arg = console.warn.getCall(0).args[0];
-    arg.should.contain('util.log.js');
+    //arg.should.contain('util.log.js');        /* Firefox does not include the stack track */
     arg.should.contain('hola');
     console.warn.restore();
   });

util/build.js

@@ -116,10 +116,6 @@ var createBundle = function(opts) {
 
   // The following 2 lines fix karma tests
   b.require('sjcl');
-  b.require('./js/util/log', {
-    expose: '../../log.js'
-  });
-
   if (opts.debug) {
     //include dev dependencies
     b.require('sinon');