bsc cfg: fix ARFCN-BSIC collisions

All three BTS are configured for ARFCN 871 and BSIC 63, which causes trouble
for handover tests. Set BSICs to 10, 11 and 12 (not 0,1,2 to mark the
distinction from the cell_identity).

It wasn't a problem so far since we cheated by passing the BTS target number
from VTY. But as soon as we will start identifying handover target cells by
ARFCN+BSIC exclusively, TC_ho_int would fall on its face without this patch.

See also: docker-playground I29a117aa54aa06ca49646f25a08af8521832fd8d
Change-Id: I2ea8889ea40953f5a23eab40db52585556a410bc
diff --git a/bsc/osmo-bsc.cfg b/bsc/osmo-bsc.cfg
index 60cfcd7..fcf7179 100644
--- a/bsc/osmo-bsc.cfg
+++ b/bsc/osmo-bsc.cfg
@@ -74,7 +74,7 @@
   location_area_code 1
   dtx uplink force
   dtx downlink
-  base_station_id_code 63
+  base_station_id_code 10
   ms max power 15
   cell reselection hysteresis 4
   rxlev access min 0
@@ -164,7 +164,7 @@
   location_area_code 1
   dtx uplink force
   dtx downlink
-  base_station_id_code 63
+  base_station_id_code 11
   ms max power 15
   cell reselection hysteresis 4
   rxlev access min 0
@@ -254,7 +254,7 @@
   location_area_code 2
   dtx uplink force
   dtx downlink
-  base_station_id_code 63
+  base_station_id_code 12
   ms max power 15
   cell reselection hysteresis 4
   rxlev access min 0