Merge branch 'feature-68-enb-agent' into feature-merge-f68

Try to merge feature-68-enb-agent into develop
develop should be fast-forwarded later to this branch to complete the merge
This code does not compile yet. Among other things:
- the scheduler structure needs to be reworked for FlexRAN
- the config is structured differently. The files enb_config.{c,h} from develop
  have been copied in here, the files with merge annotations are in
  enb_config.{c,h}.before_merge
- the restart needs to be restructured, since the PHY vars data structure lives
  in RC now

common/utils/itti/intertask_interface.c

@@ -778,15 +778,19 @@ void itti_mark_task_ready(task_id_t task_id)
 
 void itti_exit_task(void)
 {
-#if defined(OAI_EMU) || defined(RTAI)
   task_id_t task_id = itti_get_current_task_id();
+  thread_id_t thread_id = TASK_GET_THREAD_ID(task_id);
 
+#if defined(OAI_EMU) || defined(RTAI)
   if (task_id > TASK_UNKNOWN) {
     VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLE_ITTI_RECV_MSG,
                                             __sync_and_and_fetch (&itti_desc.vcd_receive_msg, ~(1L << task_id)));
   }
-
 #endif
+
+  itti_desc.threads[thread_id].task_state = TASK_STATE_NOT_CONFIGURED;
+  itti_desc.created_tasks--;
+  ITTI_DEBUG(ITTI_DEBUG_EXIT, "Thread for task %s (%d) exits\n", itti_get_task_name(task_id), task_id);
   pthread_exit (NULL);
 }