BTS_Tests: add TC_data_rtp_tch* for CSD

Change-Id: I9a0dc0fcf722f862d8dcf04660d4448662210f44
Related: osmo-bts.git I08ffbf8e79ce76a586d61f5463890c6e72a6d9b9
Related: osmocom-bb.git I0d7389a9a5f7019b9316ab1c0115797ff54a0e41
Related: OS#1572, OS#4396
2 files changed