This commit allows us to call the scheduler for
every slot indication we get to ensure we properly
configure the DCI. Also, we are sure to process the
DCI only when we have both the config (dl_tti) and
the payload (tx_req). Lastly, removed the hack
to the slot indication (we do not shift the slot
indication by -6 anymore). We are passing up to 4
NSA UEs, but sometimes one will not complete the CFRA
procedure.