bsc: Don't expect BSC to release SCCP in LCLS.TC_lcls_connect_clear()

While osmo-bsc was still affected of OS#3331, it would release the SCCP
connection from the BSC side.  This is illegal as per 3GPP spec and
has meanwhile been fixed in osmo-bsc master.  However, the testcase
BSC_Tests_LCLS.TC_lcls_connect_clear() relied on the broken behavior,
let's fix that.

The testcase now releases the SCCP connection from the simulated MSC
side in response to the BSSMAP Clear Complete from the BSC.

Change-Id: Ic3e1f8729a093b04941ec7ca72664d53adb21229
1 file changed