Before starting the VM, rename the nvram and vlan.dat files with the correct IOU application identifier.

def _rename_nvram_file(self):
        """
        Before starting the VM, rename the nvram and vlan.dat files with the correct IOU application identifier.
        """

        destination = self._nvram_file()
        for file_path in glob.glob(os.path.join(glob.escape(self.working_dir), "nvram_*")):
            shutil.move(file_path, destination)
        destination = os.path.join(self.working_dir, "vlan.dat-{:05d}".format(self.application_id))
        for file_path in glob.glob(os.path.join(glob.escape(self.working_dir), "vlan.dat-*")):
            shutil.move(file_path, destination)