fix octphy, fix conf, improve logging

Clearly separate the kinds of BTS hardware the GSM tester knows ('type') from
the NITB's bts/type config item ('osmobsc_bts_type' -- not 'osmonitb_...' to
stay in tune with future developments: it is the libbsc that needs this).

For BTS hardware kinds, use the full name of the binary for osmo driven models:
osmo-bts-sysmo, osmo-bts-trx, osmo-bts-octphy.

Change-Id: I1aa9b48e74013a93f9db1a34730f17717fb3b36c
diff --git a/selftest/real_suite/scenarios/octphy.conf b/selftest/real_suite/scenarios/octphy.conf
index 02eb48b..3a419e8 100644
--- a/selftest/real_suite/scenarios/octphy.conf
+++ b/selftest/real_suite/scenarios/octphy.conf
@@ -1,3 +1,3 @@
 resources:
   bts:
-  - type: octphy
+  - type: osmo-bts-octphy