Integrity, if enabled, not working on DRBs after NR_RRCReestablishment

After a NR_RRCReestablishment, if integrity is enabled for DRBs, they will not work because the implementation is yet to be done:

[PDCP] /home/user/openairinterface5g/openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c:1018:nr_pdcp_config_set_security: TODO

/* TODO: proper handling of DRBs, for the moment only SRBs are handled */

  if (rb_id >= 1 && rb_id <= 2) {
    rb = ue->srb[rb_id - 1];

    if (rb == NULL) {
      LOG_E(PDCP, "%s:%d:%s: no SRB found (ue_id %ld, rb_id %ld)\n", __FILE__, __LINE__, __FUNCTION__, ue_id, rb_id);
      nr_pdcp_manager_unlock(nr_pdcp_ue_manager);
      return;
    }

    integrity_algorithm = (security_modeP>>4) & 0xf;
    ciphering_algorithm = security_modeP & 0x0f;
    rb->set_security(rb, integrity_algorithm, (char *)kRRCint_pP,
                     ciphering_algorithm, (char *)kRRCenc_pP);
    rb->security_mode_completed = false;
  } else {
    LOG_E(PDCP, "%s:%d:%s: TODO\n", __FILE__, __LINE__, __FUNCTION__);
    exit(1);
  }