BTS_Tests: extend rach content tests with emergency call

The testcase tests if a CHANNEL REQUEST on the RACH leads to the correct
CHANNEL REQUIRED message on RSL level. When a MS is sending a CHANNEL
REQUEST to establish an emergency call, it uses a slightly different
layout for the request reference (RA). Lets add another similar testcase
(TC_rach_content_emerg) to cover the emergency call situation as well.

Change-Id: Ie5b7af3e93efaa6d0b412d3b1c77bc9514424f52
Related: OS#4549
1 file changed