changes for initialBWP size different than Coreset0. Tested with 50 MHz 2x2 configuration, initialBWP with 133 PRBs.

CU/DU support for most recent changes. UE continues as far as in monolithic mode. Still to apply masterCellGroupConfig in DU from RRCReconfiguration. This has to be detected in DU and applied after decoding the RRC message intended for UE.

changes in gtpu interface for testing, small changes in L1 for PUSCH signal/noise measurements. SRB2 interfaces.

Include second RRC Reconfiguration message to carry DRB, SRB2 configuration and NAS PDU Session Establishment Accept message

-Remove DRB and SRB configuration from the first RRC Reconfiguration message. Missing radio configuration to be filled in first RRC Reconfiguration message.

- Configure PUCCH Format 0 to be in separate RBs (each UE has dedicated
  resources)
- Configure RA preamble to be different per UE
- Configure CSI offset such that no two UEs have their report in the
  same frame

Nb_ue is not unique among UEs: consider 2 UEs present. The last UE has
CSI idx "2". Now the first UE disconnects, and a new UE connects. It
will also get CSI idx "2", and I assume this is not what we want.

changed DCI candidates to 4 for initialDownlinkBWP ue-specific searchSpace. ulsch/pusch stats added to nrL1stats.log