The following Merge Requests are included:

-  MR 553: L2-nFAPI-simulator improvements and nFAPI code clean-up
-  MR 554: Fixes on MAC scheduler
-  MR 558: T: minor fix: ensure printing is inside the widget 
-  MR 559: UE T Tracer: bug fixes
-  MR 561: Adding OAI UE + USRP test scenarios
-  MR 567: Adding F1 - CU/DU test scenarios

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

 ---> issue: /tmp was chmod'ed 666 on the EPC server
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/fixes-mac-scheduler-2019-w13' into develop_integration_2019_w15

 Conflicts:
	openair2/LAYER2/MAC/eNB_scheduler_ulsch.c

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

increased size of maximum SI allocation (to mcs 9 with 3 PRBs) Fixes issues with SI message using eMTC information elementswq

  -- Also added support for RF simulator
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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

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

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

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

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

Merge branch 'ci-improve-l2-sim' of https://gitlab.eurecom.fr/oai/openairinterface5g into ci-improve-l2-sim

  -- also parallel pings on L2 nFAPI simulator
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

  -- Only FDD for the moment
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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

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

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

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

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

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

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

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

Not much major changes. In openair1/PHY/LTE_UE_TRANSPORT/dci_tools_ue.c,
in the function generate_ue_dlsch_params_from_dci,
'harq_pid' was removed and dci_info_extarcted.harq_pid is now used for
all cases.

The ue T tracer only deals with PHY signals (no MAC, RLC, PDCP, RRC).

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

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

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

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

- size of PUCCH has been fixed to:
    - 2 RBs for N_RB_UL = 25 (1 RB at top of resource grid, 1 RB at bottom)
    - 4 RBs for N_RB_UL = 50
    - 6 RBs for N_RB_UL = 100
  this is arbitrary and will need some rework at some point.
  This may be also wrong. PUCCH size actually depends on DL traffic
  (if the ack/nack is not done in PUSCH) and scheduling request
  configurations.
- add sched_frame %= 1024 at one needed place
- reserve RBs for retransmission
  this was not done so new transmissions were scheduled in the same
  RBs. Since the code works with the notion of 'first_rb' only, it
  was decided to skip all RBs lower than those retransmitted. This
  works but is not correct (imagine we have to retransmit RB 23, then
  all RBs < 23 will not be used for new transmission). The work to
  fix this properly is complex, a lot has to change, so let's do it
  this simple way for now.
- sort_ue_ul was not correct
  - add the function maxround_ul to use the correct 'round' (the one
    from DL was used, which is totally wrong)
  - be sure to use the correct frame/subframe to get the correct HARQ pid

For retransmission, let's use cqi_req used for the 1st transmission.

Maybe incorrect, should check the specs. (In the worst case, we
simply won't decode this transmission at all. No big deal.)