bsc: Do proper chan release in TC_ho_out_fail_no_ho_detect

BSC waits to receive a ClearCommand in response to its ClearRequest
before it starts tearing down the MGCP conn on the MSC-side of the MGW
endpoint.

As a result, expected DLCX was not being sent which made test fail.

However, currently test still fails because current osmo-bsc master
sends a repeated ClearRequest message in this scenario.

Related: OS#4078
Change-Id: Ic398896147a0b6b04ffeae56a23d25783b2b17fe
1 file changed