functions up to Msg3 reception. Still a bug in decoding, signal is perfect, but decoding fails. probably an issue in the descrambling

Merge branch 'RU-RAU-split' of https://gitlab.eurecom.fr/raymond.knopp/openairinterface5g into RU-RAU-split

Conflicts:
	openair1/PHY/LTE_TRANSPORT/edci.c
	openair2/LAYER2/MAC/eNB_scheduler_RA.c

Conflicts:
	openair1/SCHED/phy_procedures_lte_eNb.c
	openair2/ENB_APP/enb_config.c
	openair2/LAYER2/MAC/eNB_scheduler_primitives.c
	openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
	openair2/RRC/LITE/MESSAGES/asn1_msg.c
	targets/RT/USER/lte-ru.c

Conflicts:
	openair1/PHY/CODING/rate_matching.c
	openair1/PHY/LTE_REFSIG/primary_synch.h
	openair2/LAYER2/layer2_top.c
	openair2/RRC/LITE/rrc_config.c

just a quick fix before merge, the real solution
is to disable pusch scheduling in the prach, to be
done later

- compile with warning enabled (changes in CMakeLists.txt)
- remove warnings that were present

- allocate memory, memory on stack does not survive the function
- avoid uint32_t, use a char buffer, for endianness neutrality

basically the T_xx variables are int, not uint

The warning was:

/roux/ru/openairinterface5g/openair1/PHY/LTE_TRANSPORT/pucch.c: In function 'generate_pucch2x':
/roux/ru/openairinterface5g/openair1/PHY/LTE_TRANSPORT/pucch.c:729:73: warning: array subscript is above array bounds [-Warray-bounds]
       AssertFatal(1==0,"Illegal modulation symbol %d for PUCCH %s\n",B2,pucch_format_string[fmt]);
                                                                         ^
/roux/ru/openairinterface5g/common/utils/./itti/assertions.h:52:53: note: in definition of macro '_Assert_'
                 __FUNCTION__, __FILE__, __LINE__, ##aRGS);  \
                                                     ^~~~
/roux/ru/openairinterface5g/openair1/PHY/LTE_TRANSPORT/pucch.c:729:7: note: in expansion of macro 'AssertFatal'
       AssertFatal(1==0,"Illegal modulation symbol %d for PUCCH %s\n",B2,pucch_format_string[fmt]);
       ^
The root cause was that the array pucch_format_string was not in sync with
the structure. (This plus why force its size and put \0 in the string...)

phy_init_lte_ue_signal was renamed init_lte_ue_signal in openair1/PHY/INIT/defs.h
maybe it's the opposite that should have been done?

Functions used in one file and defined in another may have been
declared in the wrong header file.

modifications for TDD and IF4p5 (in particular TDD). Both in RRU and RAU components. Monolithic is unchanged.

Old values valid for a previous UE have to be reset for the new UE.

introduce a new function to deal with this special case

Compilation will fail if UHD is not installed, there is no need
to check. Plus the test is wrong when you install UHD somewhere
else.