RRCConnectionSetup(Msg4) fails in TDD config1

In TDD config1, assertion occurs in nack_or_dtx_reported() function and RRCConnectionSetup(Msg4) fails.

We are evaluating TDD config1 with fairRR scheduler. FairRR scheduler is activated by writing config files "scheduler_mode = "fairRR";"

This issue occures with following revision.

develop branch Revision: 76ff6586 Date: 2018/06/26 19:30:24