net/templates: move bsc cfg/vars to bsc0

Prepare support for a second BSC, in order to test OsmoBSCNAT.

* Rename BSC_* variables to BSC0_*
* Rename MGW4BSC_* variables to MGW4BSC0_*
* Rename osmo-bsc.cfg to osmo-bsc-0.cfg
* Rename osmo-mgw-for-bsc.cfg to osmo-mgw-for-bsc-0.cfg

Change-Id: Iaba2e3143b7bb6451a0104042e69d47ee5f48d3c
diff --git a/net/config_2g3g b/net/config_2g3g
index e50d13c..0bd2b89 100644
--- a/net/config_2g3g
+++ b/net/config_2g3g
@@ -80,13 +80,13 @@
 MGW4MSC_PORT="2427"
 MGW4MSC_VTY_IP="127.0.0.6"
 
-MGW4BSC_IP="${TO_RAN_IP}"
-MGW4BSC_PORT="2427"
-MGW4BSC_VTY_IP="127.0.0.7"
+MGW4BSC0_IP="${TO_RAN_IP}"
+MGW4BSC0_PORT="2427"
+MGW4BSC0_VTY_IP="127.0.0.7"
 
-BSC_IP="${TO_RAN_IP}"
-BSC_PC="0.23.3"
-BSC_CODEC_LIST="hr3"
+BSC0_IP="${TO_RAN_IP}"
+BSC0_PC="0.23.3"
+BSC0_CODEC_LIST="hr3"
 
 HNBGW_PC="0.3.0"
 HNBGW_IP="${TO_RAN_IP}"
@@ -120,7 +120,7 @@
 # STP_RAN_IP="127.0.0.2"
 
 # Enabled only when STP_CN_IP != STP_RAN_IP
-BSCNAT_CN_PC="${BSC_PC}"
+BSCNAT_CN_PC="${BSC0_PC}"
 BSCNAT_CN_IP="127.0.0.3"
 BSCNAT_RAN_PC="${MSC_PC}"
 BSCNAT_RAN_IP="127.0.0.4"