osmo-trx: Set more restrictive logging levels to avoid sporadic high load on stderr

Change-Id: I9dca89027d9015b946440363eae5f7bd3e082268

src/osmo_gsm_tester/templates/osmo-trx.cfg.tmpl

@@ -9,6 +9,9 @@ log stderr
   logging print file basename
   logging print extended-timestamp 1
   logging level set-all info
+  logging level ctr notice
+  logging level trxddl notice
+  logging level trxdul notice
 !
 line vty
  bind ${osmo_trx.trx_ip}