nr-ip-over-LTE: Resolved issue with duplicate IP packet at the receiver UE IP interface and packet losses are reduced. Remaining to identify why occasionally IP packets are received at the PDCP stack later than the time slot of their arrival at PHY/MAC. Introduced some debug logs, to be removed later.

remove RRC_VERSION macros, simplify build-oai and CMakefile.txt accordingly, get rid of remaining compilation warnings (opt module improperly merged and patch asn1c files with tests against max 64 bits integer value)

nr-ip-over-LTE: Small fixes, now IP traffic is received at the IP interface of the UE but there are many packet losses and occasionally there are duplicate ping requests received, leading to UE crashing

Added Rx indication for DLSCH type and resolved issue with MIB decoding while sending DL IP traffic. Data packets still not parsed properly at the UE MAC layer.

- adding SCHED_NR_UE_LIB to ulsim compilation library
- fixing linking compilation problems
- using fapi_nr_dci_pdu_rel15_t struct to initialize PUSCH
- test_input random data is set in phy_procedures_nrUE_TX instead of ulsim

Final --phy_simulators warning removals for this branch, and former polar coding function corrections

removing printfs

first version of UE FAPI handling for DLSCH. paramters from DCI are now handled by MAC and passed back to the PHY to program PDSCH. Still need to check parameters and take them into account in PHY.

hardcoding N_PRB of PDCCH in UE MAC (was in UE PHY before). This is still a temporary solution until UE FAPI is correctly done. But at least it decodes the DCI again.
fixing some warinings

UE: Add FAPI structure clean by every slot, update UL_CONFIG_REQ for PRACH, DL_CONFIG_REQ for DL-SCH and filling PHY parameter "dlsch", "dlsch_harq".: