BTS_Test_ASCI: Add Talker establishment/release test

A VGCS channel is activated. The BSC sends UPLINK FREE message. The MS
sends RACH on VGCS channel. The MS receives VGCS UPLINK GRAND and
establishes layer 2. Then the BSC forces to releases the uplink. The MS
receives UPLINK FREE again.

Change-Id: Ic86bc34890c7d1e6e0b255c3d40eda3dfaa59285
Related: OS#4851
2 files changed