bts config: tweak logging parameters

The BTS logs grew exceptionally large because of logging 'level all debug'.

Change-Id: I2901bf47a7b12aabcbd416ca7da49db886a061d5
diff --git a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
index d416361..ae74ae2 100644
--- a/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-bts-trx.cfg.tmpl
@@ -1,12 +1,16 @@
 ! Configuration rendered by osmo-gsm-tester
 log stderr
   logging color 1
-  logging timestamp 1
   logging print extended-timestamp 1
   logging print category 1
-  logging level all debug
-  logging level l1c info
-  logging level linp info
+  logging level abis debug
+  logging level oml debug
+  logging level pag debug
+  logging level rll debug
+  logging level rr debug
+  logging level rsl debug
+  logging level l1c error
+  logging level l1p error
 !
 phy 0
  instance 0