Works up to the reception of the RA_RESPONSE at the UE. Crashing at fill_rx_indication_UE_MAC just before sending Msg3.

Connected new callback functions at nfapi_pnf for phy_stub mode + Intorducing new functions initializing UE variables and threads specific to phy_stub mode, instead of extending the existing ones + Direct connection of the timer_thread with UE_phy_stub_thread_rxn_txnp4.

Introduce nfapi_mode variable to differentiate functionality between phy_stub_ue mode (nfapi_mode=3) and normal full stack mode (nfapi_mode!=3).

Added handling of HI_DCI0_config requests at UE MAC. Eliminated calls to PHY functions from utilized UE MAC functions (e.g., ue_send_sdu) to support phy_stub operation mode.

Added MAC level state variable for the UE and control mechanisms to ensure the correct operation of the UE MAC state machine.

Added remaining fill_harq indication functions + the functionality to handle ul_config request pdus arriving from nfapi-vnf: trigger the appropriate UE_MAC and fill_indication functions to prepare the UL_indications which will be put into the socket for transfer back to vnf. Main changes within phy_stub_UE().

Definition of the UE MAC interface: IF_Module_UE.h, IF_Module_UE.c, UE_MAC_interface.h and the supporting functions.

Note: this commit is work in progress. Contains initial integration of NFAPI data structures which are tested for TX path. RX path to follow.

--ue-trace : Enabling UE trace for debug
--ue-timing : Enabling UE timing trace
--ue-no-log : Disabling all LOG_X traces

- import RRC ASN.1 defintions from the specifications
  (file openair2/RRC/LITE/MESSAGES/asn1c/ASN1_files/RRC-e10.asn)
  contrary to rel8/10, all modules have been imported, maybe it's too much
  to refine in case of problems
- deal with rel14 in fix_asn1
- all code that was for Rel10 is now for Rel10/Rel14
- some incompatible changes (mostly in naming) were resolved in favor
  of rel14, see in openair2/RRC/LITE/defs.h
- unsure about the rlc layer, some arrays have changed (values appended),
  I only changed the definition and in tests in the code, I changed
  the index limit, maybe it's not enough

Rel14 is the default compilation mode.

Some of them might not be correctly handled.
I put /* TODO: XXX */ where I didn't know if
the fix was correct.

fix incorrect fss_pusch calculation
fix the incorrrect HARQ-PID checking
remove incorrect checking on downlink DCI HARQ PID value
fix incorrect downlink ACK/NACK feedback procedures in TDD
fix no activating PDSCH decoding when DL-DCI is indicating a downlink retransmission

see issue #176

           1- frame/subframe update
           2- ccch discard regression