Disable subcommand.

def disable(cls, args):
        """Disable subcommand."""
        mgr = NAppsManager()

        if args['all']:
            napps = mgr.get_enabled()
        else:
            napps = args['<napp>']

        for napp in napps:
            mgr.set_napp(*napp)
            LOG.info('NApp %s:', mgr.napp_id)
            cls.disable_napp(mgr)