Add in conditional args and then return all conn info.

def args2body(self, parsed_args, body=None):
        """Add in conditional args and then return all conn info."""

        if body is None:
            body = {}
        if parsed_args.dpd:
            vpn_utils.validate_dpd_dict(parsed_args.dpd)
            body['dpd'] = parsed_args.dpd
        if parsed_args.local_ep_group:
            _local_epg = neutronv20.find_resourceid_by_name_or_id(
                self.get_client(), 'endpoint_group',
                parsed_args.local_ep_group)
            body['local_ep_group_id'] = _local_epg
        if parsed_args.peer_ep_group:
            _peer_epg = neutronv20.find_resourceid_by_name_or_id(
                self.get_client(), 'endpoint_group',
                parsed_args.peer_ep_group)
            body['peer_ep_group_id'] = _peer_epg
        return {self.resource: body}