Reload NApps code.

def reload(cls, args):
        """Reload NApps code."""
        LOG.info('Reloading NApps...')
        mgr = NAppsManager()

        try:
            if args['all']:
                mgr.reload(None)
            else:
                napps = args['<napp>']
                mgr.reload(napps)

            LOG.info('\tReloaded.')
        except requests.HTTPError as exception:
            if exception.response.status_code != 200:
                msg = json.loads(exception.response.content)
                LOG.error('\tServer error: %s - ', msg['error'])