adds support for:
* create/remove slices
* change UE-slice association
* read/write slice parameters
* find slice index via ID

slice_counter had a wrong condition, not scheduling in DLSCH if the number of
slices is greater than one

- introduce structure in RC for slicing conf (UL/DL)
- move global variables regarding slice configuration into RC
- change ue_slice_membership(): consider UL/DL
- remove the unnecessary header files
- set default parameters: one slice

Bug only occurs when compiling without AVX2

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

  -- Configuration files for a Band-40 test setup
  -- XML file test on band-40 for 5 and 10 MHz in DL only
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

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

Develop integration 2018 w35

See merge request oai/openairinterface5g!378

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

Conflicts:
	cmake_targets/CMakeLists.txt
	openair1/PHY/LTE_TRANSPORT/dlsch_modulation.c
	openair1/SCHED_UE/phy_procedures_lte_ue.c
	openair2/LAYER2/MAC/eNB_scheduler_phytest.c

Merge remote-tracking branch 'origin/issue_344_segv_trace_wireshark' into develop_integration_2018_w35