PCU_Tests_RAW.ttcn: TC_cs_lqual_ul_tbf: properly check for Dynamic Assignment

According to 3GPP TS 44.018, section 10.5.2.16 "IA Rest Octets",
Packet Uplink Assignment can be either of the following types:

  - single block allocation,
  - dynamic allocation.

The current version of TC_cs_lqual_ul_tbf does not handle single
block allocation, so we need to make sure we got a TBF with
dynamic allocation.

Change-Id: I05cf0c62d21094fb53a9e5e54b404f3cf972a182
1 file changed