F1AP SCTP: don't bind local address

binding the local address for SCTP is pointless, because we don't really
care through which interface SCTP traffic goes. Actually, we even might
want to set the DU remote_n_addr and the the local_n_addr to addresses
in different networks, because we might want to have GTP traffic go
through a different interface than SCTP, as done in the CI test for E1.

openair2/F1AP/f1ap_du_task.c

@@ -54,8 +54,6 @@ void du_task_send_sctp_association_req(instance_t instance, f1ap_net_config_t *n
   sctp_new_association_req_p->out_streams = 2; //du_inst->sctp_out_streams;
   // remote
   memcpy(&sctp_new_association_req_p->remote_address, &nc->CU_f1_ip_address, sizeof(nc->CU_f1_ip_address));
-  // local
-  memcpy(&sctp_new_association_req_p->local_address, &nc->DU_f1_ip_address, sizeof(nc->DU_f1_ip_address));
   // du_f1ap_register_to_sctp
   itti_send_msg_to_task(TASK_SCTP, instance, message_p);
 }