Changes on enb::stop and rem_user to avoid segfaults

srsenb/src/enb.cc

@@ -228,13 +228,13 @@ void enb::stop()
 {
   if(started)
   {
+    gtpu.stop();
     phy.stop();
     mac.stop();
-    usleep(1e5);
+    usleep(100000);
 
     rlc.stop();
     pdcp.stop();
-    gtpu.stop();
     rrc.stop();
 
     usleep(1e5);

srsenb/src/upper/rrc.cc

@@ -224,6 +224,7 @@ void rrc::rem_user(uint16_t rnti)
     rrc_log->info("Disconnecting rnti=0x%x.\n", rnti);
     /* **Caution** order of removal here is imporant: from bottom to top */
     mac->ue_rem(rnti);  // MAC handles PHY
+    usleep(50000);
     rlc->rem_user(rnti);
     pdcp->rem_user(rnti);
     gtpu->rem_user(rnti);