configuration of SRB1 for monolithic and CU/DU, move some parameters from RRC to MACRLC section in configuration file.

- a new section in the configuration file to select security algorithms,
  with new code to deal with it
- cleanup CG-ConfigInfo: specs seem to indicate that we must not
  add mcg_RB_Config; the gNB has to deal with that
- as a consequence, modify fill_default_rbconfig() that is called in
  every cases and needs security and bearer parameters

The new section in the configuration file looks like:

    security = {
      # preferred ciphering algorithms
      # the first one of the list that an UE supports in chosen
      # valid values: nea0, nea1, nea2, nea3
      ciphering_algorithms = ( "nea0", "nea2" );

      # preferred integrity algorithms
      # the first one of the list that an UE supports in chosen
      # valid values: nia0, nia1, nia2, nia3
      integrity_algorithms = ( "nia0" );
    };

MIB NR: pdcch_ConfigSIB1 selection and fill using the configuration file, and using a dynamic method.

This commit contains work done by Eurecom and by Benetel.

Add UEContextReleaseCommand Message
Modify NGSetup Message Encode failed

Add UEContextReleaseCommand Message
Modify NGSetup Message Encode failed

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

ENABLE_ITTI macro removal, modified telnet server to support all executables, modified record player to finalize switch to run-time option and allow usage with any device

Mainly comestics and integer type management
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

- reworked configuration file and configuration for gNB (write directly to ASN1 structure from config module instead of passing intermediate structures)
- added prach procedures for gNB with configuration of PRACH L1/L2 parameters

phy_simulators do compile, but dlsim&nr_(ulsch/dlsch/pbch)sims do not pass tests + Raphael's CI patch applied.

First build command : ./build_oai --gNB -w USRP -I

But NR-RRC-Definitions.asn file only include the NR-RRC-Definitions DEFINITIONS section
If we include the NR-UE-Variables into asn file, it will can't be compile in asn tool
and also some of implict problem for new version asn file