PCU_Tests_SNS: fix TC_pcuif_rach

The tesctcase TC_pcuif_rach expects an immediate assignment message on
the AGCH but the template still uses the now deprecated (old v10 PCUIF)
SAPI PCU_IF_SAPI_AGCH. With PCUIF v.11 we must use PCU_IF_SAPI_AGCH_2

Related: OS#5927
Change-Id: Ie8b2e21e184282f70c92d6b9f716cfda1405ef4d
1 file changed