TC_dl_multislot_tbf_ms_class_from_sgsn PCU_Tests

Failing for the past 1,952 builds since #689

Took 2.1 sec (from Titan)

Stack Trace

Expected 8 PDCH slots allocated but got 4
      PCU_Tests.ttcn:7752 PCU_Tests control part
      PCU_Tests.ttcn:3470 TC_dl_multislot_tbf_ms_class_from_sgsn testcase