CI: Parse UE TUN interface correctly in S1 mode

See also commit 8c5976e27907147fba629e822704d724336f5200

Above commit changed the TUN interface configuration to use program "ip"
only. This commit changes the CI script parsing correspondingly: the
pipeline will recognize the attempt to bring up the interface of the
first UE.

ci-scripts/reportTestLocally.sh

@@ -470,7 +470,7 @@ function report_test {
                     then
                         NB_UE_TUNNEL_UP=`egrep -c "Interface oaitun_ue1 successfully configured" $UE_LOG`
                     else
-                        NB_UE_TUNNEL_UP=`egrep -c "executing ifconfig oaitun_ue1" $UE_LOG`
+                        NB_UE_TUNNEL_UP=`egrep -c "ip link set oaitun_ue1 up" $UE_LOG`
                     fi
                     if [ $NB_ENB_GOT_SYNC -gt 0 ] && [ $NB_UE_GOT_SYNC -gt 0 ] && [ $NB_ENB_SYNCED_WITH_UE -gt 0 ]
                     then