fixing handling of ndi/first_tx in dci. commenting out corner case of missed ACK, this needs to be done better

--ue-trace : Enabling UE trace for debug
--ue-timing : Enabling UE timing trace
--ue-no-log : Disabling all LOG_X traces

those popped up thanks to previous commit

for DCI format 2. Temporaryly going back to the previous
version of code.
2. Enabling rate adaptation with multiple HARQ rounds.
(no change inside the rounds).

mcs1 was taken instead of mcs2 in several places.