code: function (args, ex) {
          if (ex) {
              this.$logError(this.EXCEPTION_CREATING_MODULECTRL, [args.desc.classpath], ex);
          }
          this.$callback(args.cb, {
              error : true
          });
      }
docs: Error callback method called if there is a failure while loading the module controller class, or the flow
  controller class. It is also called if there is an exception in the module controller creation process.
  @param {Object} args
  @param {Object} ex exception
  @private