Add scenarios for each osmo-bts-trx type

This way we can run tests with a specific instance of an osmo-bts-trx,
for instance we may want to run some tests with an Ettus B200 and also
with a sysmoCell 5000.

Change-Id: I5fd78d79b8bfab8ccacc4666563b66b6da9f2bde
4 files changed