4G: Add milenage support

Change-Id: I4c1fb9bfec9927f2bfa29e6b27959323838f59e5
diff --git a/src/osmo_gsm_tester/templates/srsue.conf.tmpl b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
index a75be23..3a43f17 100644
--- a/src/osmo_gsm_tester/templates/srsue.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsue.conf.tmpl
@@ -126,7 +126,9 @@
 [usim]
 mode = soft
 algo = ${ue.auth_algo}
-#opc  = 63BFA50EE6523365FF14C1F45F88737D
+% if ue.opc is not None:
+opc  = ${ue.opc}
+% endif
 k    = ${ue.ki}
 imsi = ${ue.imsi}
 imei = 353490069873319