templates: fix deprecated BTS type: s/sysmobts/osmo-bts/

This change fixes the following deprecation warning:

% BTS type 'sysmobts' is deprecated, use 'type osmo-bts' instead.

Change-Id: Iab1a0d14de5349438e73edfb57be4f7271afbfef
diff --git a/doc/examples/2g_osmocom/defaults.conf b/doc/examples/2g_osmocom/defaults.conf
index 06d596a..73ca685 100644
--- a/doc/examples/2g_osmocom/defaults.conf
+++ b/doc/examples/2g_osmocom/defaults.conf
@@ -20,7 +20,7 @@
 bsc_bts:
   base_station_id_code: 63
   stream_id: 255
-  osmobsc_bts_type: sysmobts
+  osmobsc_bts_type: osmo-bts
   channel_allocator: ascending
   gprs_mode: gprs
   num_trx: 1
diff --git a/doc/manuals/chapters/config.adoc b/doc/manuals/chapters/config.adoc
index f4e08b3..6bc899c 100644
--- a/doc/manuals/chapters/config.adoc
+++ b/doc/manuals/chapters/config.adoc
@@ -431,7 +431,7 @@
   location_area_code: 23
   base_station_id_code: 63
   stream_id: 255
-  osmobsc_bts_type: sysmobts
+  osmobsc_bts_type: osmo-bts
   trx_list:
   - nominal_power: 23
     max_power_red: 0
diff --git a/sysmocom/defaults.conf b/sysmocom/defaults.conf
index af5c52c..1501273 100644
--- a/sysmocom/defaults.conf
+++ b/sysmocom/defaults.conf
@@ -29,7 +29,7 @@
 bsc_bts:
   base_station_id_code: 63
   stream_id: 255
-  osmobsc_bts_type: sysmobts
+  osmobsc_bts_type: osmo-bts
   channel_allocator: ascending
   gprs_mode: gprs
   num_trx: 1