- dci_request and dl_indication for PBCH now also on stack
 - fixed type of nrUE_config (was using structure for gNB before)
 - added configuration of PBCH to phy_config_request and using this config now in phy_procedures_nr_ue
 - we need to add configuration of PDCCH and PDSCH also to phy_config_request (there are still some hardcoded parameters)
 - removed UL scheduling for now

Integration nr 2019 w21

See merge request oai/openairinterface5g!598

this commit includes pucch format0 receiver and testbench for pucch format0 without ofdm. Also it has some fixes to pucch_nr.c

testing merge with develop-nr. removal of pthread_mutex_timedlock, we were using the wrong time argument (needed to be absolute).

Conflicts:
	openair1/SCHED_NR/sched_nr.h

Test x310

See merge request oai/openairinterface5g!585

CI: adding support for the N300 gNB + NR-UE testing

See merge request oai/openairinterface5g!586

removing old mimo mode

See merge request oai/openairinterface5g!587