fix: let run_enb_ue_virt_s1 work with "default" openair-cn

changes:
- ue mcc/mnc 208.93
- use correct key/opc for user
- change addresses in conf file for them to be easier to understand
  (maybe)

With those changes, running:
   sudo ./run_enb_ue_virt_s1
in cmake_targets/tools should work out of the box

The user still has to configure correct IP addresses in
targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.generic.oaisim.local_mme.conf

We supposed oaisim (enb+ue) machine to be on IP address 10.0.1.1
and EPC (hss, mme, spgw) machine to be on IP address 10.0.1.2.

openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf

@@ -87,8 +87,8 @@ UE0:
 
     SIM: {
         MSIN="0100001111";
-        USIM_API_K="fec86ba6eb707ed08905757b1bb44b8f";
-        OPC="C42449363BBAD02B66D16BC975D77CC1";
+        USIM_API_K="8baf473f2f8fd09487cccbd7097c6862";
+        OPC="e734f8734007d6c5ce7a0508809e7e9c";
         MSISDN="33611123456";
     };