Guess what happens when we return from the function...

The case instance == INSTANCE_DEFAULT should normally not happen,
but let's be a bit verbose if it does.

oaisim is not functional with several UEs.
This fixes one issue. (It's still not functional for other reasons.)

It was not setting emm_data->eplmn.plmn[X], only emm_data->eplmn.n_plmns,
leading to the UE to dig for PLMN 00000.

(It's not the end of the story, seems like the PLMN selection
does not work, the UE only tries one from what I've seen, but
I didn't dig much, may be wrong.)

Adapt calling sites too.

When data comes from the user, it is good to check that
what we read is correct and warn the user if it's not.

Also included some source files not related to this branch.

	modified:   openair1/PHY/LTE_ESTIMATION/lte_dl_bf_channel_estimation.c
	modified:   openair1/PHY/LTE_TRANSPORT/pilots_ue_spec.c
	modified:   openair1/PHY/MODULATION/beamforming.c
	modified:   openair1/PHY/TOOLS/twiddle18432.h
	modified:   openair1/SIMULATION/LTE_PHY/dlsim_tm7.c
	modified:   openair3/NAS/TOOLS/nvram.c
	modified:   openair3/NAS/TOOLS/usim.c
	modified:   openair3/NAS/UE/user_defs.h

That's not the end of the story though.

I am not sure if it's the right way to solve the
problem, so I keep the definitions here and
put them inside #if 0 #endif

In openairinterface5g many definitions in many layers of UE or eNB NB_MAX.
We created a file called openairinterface5g_limits.h
located at openairinterface5g_dir/targets/COMMON/ declaring the number max
of UE and eNB to be used in ALL layers depending on launching conditions
(LARGE_SCALE for example).

This remove the old static lists

There was a side effect corrupting data because hplmn_index was not computed.

TODO add option to conf2uedata and adapt script

This patch adds the conf2uedata tool for generating .ue.nvram* .ue.emm.nvram*
and .usim.nvram* files from a textual configuration file.

The configuration file define most usefull values like plmns, mnc, mcc, msin, K,
OPc for several users.
The files generated will always ends with a number corresponding to the user
entry in the configuration file.

This breaks oai5g because other script have not be updated for using
conf2uedata.
This breaks also the at_nas_ue command.

Examples of configuration files are in openair3/NAS/TOOLS/