cosmetic: bsc_network_init(): imply default 001-01 PLMN

All callers pass mcc=1, mnc=1, so just have it as default.
(Prepare for net->country_code etc to be replaced by net->plmn)

Change-Id: Ic16bc0bab3f2d4721e86a1a04f9d9f988d777df2
diff --git a/tests/channel/channel_test.c b/tests/channel/channel_test.c
index f37877e..b41e3d6 100644
--- a/tests/channel/channel_test.c
+++ b/tests/channel/channel_test.c
@@ -38,7 +38,7 @@
 	printf("Testing the lchan printing:");
 
 	/* Create a dummy network */
-	network = bsc_network_init(tall_bsc_ctx, 1, 1);
+	network = bsc_network_init(tall_bsc_ctx);
 	if (!network)
 		exit(1);
 	/* Add a BTS with some reasonanbly non-zero id */