ttcn3-bts-test: enable running GPRS related tests with trxcon
Change-Id: I06ad8e6403e2538c64d650f19a8d0bd4a344edbe
Depends: osmo-ttcn3-hacks.git Ib8f4459480bbe12584a6fa71882f745f03c5055d
Related: osmocom-bb.git I9567d64f9d00262e36147e8d7e541e5e246bda5f
Related: OS#5500
