library/PCUIF_Types.ttcn: add optional parameter for RACH SAPI

Do not hard-code PCU_IF_SAPI_RACH for RACH.ind templates. We need
to be able to specify other SAPIs (PCU_IF_SAPI_PTCCH) in the
upcoming test cases for Timing Advance control.

Change-Id: I7e2ebcbba5e47cf44f064e429c0517ef3acb15af
1 file changed