Enable a list of NApps.

        Args:
            napps (list): List of NApps.

def enable_napps(cls, napps):
        """Enable a list of NApps.

        Args:
            napps (list): List of NApps.
        """
        mgr = NAppsManager()
        for napp in napps:
            mgr.set_napp(*napp)
            LOG.info('NApp %s:', mgr.napp_id)
            cls.enable_napp(mgr)