Add test to trigger re-establishment to RFSIM F1 CI

* trigger re-establshemnt on DU: reset RLC counters on DRB 1
  for OAI UE, since SRB 1 does not work for lack of periodic
  measurements reports
* how is the re-establishment triggered?
  * a transmission on DRB 1 occurs
  * detection of a mismatch of RLC counters at the UE side
  * max number of RLC retransmissions reached
  * RLF detection
* verify re-establishment on CU: we ping the core from the UE; this
  sends packets on DRB, and because the sequence number mismatches, will
  trigger a reestablishment. We accept in the ping that a couple of
  packets might be lost; after ping is over, reestablishment must be
  done as well (else the ping will already fail).

ci-scripts/yaml_files/5g_f1_rfsimulator/docker-compose.yaml

@@ -87,8 +87,11 @@ services:
         container_name: rfsim5g-oai-cu
         cap_drop:
             - ALL
-        environment:
+        environment: 
             USE_ADDITIONAL_OPTIONS: --log_config.global_log_options level,nocolor,time
+                                    --rfsimulator.options chanmod
+                                    --telnetsrv --telnetsrv.listenaddr 192.168.71.150
+                                    --telnetsrv.shrmod ci
             ASAN_OPTIONS: detect_leaks=0
         depends_on:
             - oai-ext-dn
@@ -113,6 +116,7 @@ services:
                                     --log_config.global_log_options level,nocolor,time
                                     --rfsimulator.options chanmod
                                     --telnetsrv --telnetsrv.listenaddr 192.168.71.171
+                                    --telnetsrv.shrmod ci
             ASAN_OPTIONS: detect_leaks=0:detect_odr_violation=0
         depends_on:
             - oai-cu