This commit contains work done by Eurecom and by Benetel.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Previously, the various rlc_*_ind() functions had a parameter to enable
the MAC to specify the max TB size that a subsequent call to the
corresponding rlc_*_req() (!) function would return. This patch removes
this parameter from the rlc_*_ind() functions and makes the parameter
working that is already in the rlc_*_req() functions.

UE_list_t is now used as a separate list. It can be e.g. used in the
scheduler to mark groups of users. The original UE_list_t is renamed to
UE_info_t to reflect that it is a container for information about UEs.

ignoring command line paramters clock_source and time_source in lte-softmodem and harmonizing it with nr-softmodem
time_source and clock_source handled separately in usrp_lib.cpp

fixing beam to boresight for testing

The timer code used to trigger periodic statistics message sending used
ITTI. Together with a high frequency reporting (e.g. 1ms), this resulted
in high CPU usage. This commit reimplements this:
* using a thread that is synchronized to the RU (if there is no MAC, we
  assume there is no RU generating a tick so we create the tick source
  ourselves)
* no RB trees but plain arrays
* smaller interface for users
* slight user interface changes
* remove stopped timer state: such timer might be simply removed
* remove one-shot timers

* only set up timer for sending requests
* simplify interface for timer setup
* on timer expiry, do not pass through stats request function but
  directly send the reply
* Remove whatever report structure and use stats request directly for
  inferring the data to send

 - physical simulators
 - LTE eNB
 - LTE UE
 - 5G-NR gNB

Still NR-UE does not build and eNB segs fault at start of program
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

ENDC: Add X2AP initial configuration and X2AP task in nr-softmodem. Small issue with parsing NRCCPARAMS_DESC from RCconfig_NR_X2() needs to be resolved

ENDC: Reverse the role of eNB and gNB for the ENDC X2 setup procedure. Currently, gNB: slave sending the setup request, eNB:master.

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)

	-M2 register against MCE (Multicast Control Entity)
	-Basic M2AP control procedures developed (eNB<-M2AP->MCE)

	ACKNOWLEDGEMENT:
 	1. This commit was developed at Vicomtech (https://www.vicomtech.org) under UE project CDN-X-ALL: "CDN edge-cloud computing for efficient cache and reliable streaming aCROSS Aggregated unicast-multicast LinkS"
 	2. Project funded by Fed4FIRE+ OC5 (https://www.fed4fire.eu)
Signed-off-by: Javier Morgade <javier.morgade@ieee.org>

To control along with pusch_maxNumRepetitionCEmodeA_r13 the actual number of repetitions for PUSCH according to 36.213 table 8.2b
Scope of commit: Parsing parameter's value. The value should be used in future commits.
Signed-off-by: Mohamed Gamal <mohammed.abdelkhalek.ext@orange.com>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Fix a few cppcheck errors/warnings
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>