- 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.)

Develop Integration Branch 2019 week 13

The following MRs have been integrated:

* MR 524 : Feature 127 -- Protocol Split F1 -- CU/DU
* MR 539 : Documentation on the new build/simulation system
* MR 542 : TDD fixes
* MR 545 : Initial framework testing for OAI UE testing over-the-air
* MR 546 : Fix in FlexRan code
* MR 548 : new Thread Pool feature

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>

    fixed also new warnings
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

This resolves the following warning:
"error: invalid suffix on literal; C++11 requires a space between literal and
identifier"
Since this file might be included from a C++11 file. It only adds spaces.

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

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

Signed-off-by: Boris Djalal <boris.djalal@eurecom.fr>

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