Changes

PCU_Tests_SNS: SNS Add: handle NS_Alive while waiting for SNS_Ack

Similiar to 61ccea9ecadc ("PCU_Tests_SNS: del/change weight: don't fail on NS"),
the SNS Add procedure might have to handle a NS Alive PDU in the receiving queue while waiting
for a SNS ACK.

Related: OS#6611
Change-Id: I10646d9acfe280ddfb8852a4d5c37882aae99874

testenv: make copy= more intuitive

Currently copy= in testenv.cfg creates copies of files under the full
source file name under the target directory: copy=dir/file.cfg creates
dir/file.cfg (like "cp -a --parents"). This is not very intuitive,
change it to create a "file.cfg" instead without subdirectory. With
this change, it behaves the same as "cp -a".

Suggested-by: Pau Espin Pedrol <pespin@sysmocom.de>
Change-Id: Id9e4ea066d0a0e72ccd83e4f6f887f382bf61e46

remsim: Add initial testenv

"server" testsuite is working as goos as in docker-playground.git
"bankd" testsuite is currently failing due to bankd exiting early after
starting.
"client" is not currently working/running in docker-playground, initial
config copied here for completeness.

This commit hence allows already quickly running "server" testsuite.

Change-Id: Ic69a04342a4cdfced90cf8ffbe7e5cdede8d4b8e

RAW_NS: SNS Add: handle IPv4/IPv6 element in SNS Ack

When adding a new NS-VC via SNS Add, the SNS Ack should
only contains the IEs "List of IP4/6 elements" if the cause code is
Unknown IP endpoint.

However the libosmocore/ns2 code isn't following this behavior yet.

Change-Id: I18c659e43db79400c1b428ed745267a5e6e59102

RAW_NS: SNS Changeweight: remove IPv4/IPv6 element in SNS Ack

When changweights of a NS-VC via SNS, the SNS Ack should
only contains the IEs "List of IP4/6 elements" if the cause code is
Unknown IP endpoint.

However the libosmocore/ns2 code isn't following this behavior yet.

Change-Id: Ibf00cbab0c6691cdb72fe592ee30e122dd8f4783

PCUIF: fix usage of bts number in PCUIF_TXT_IND

When we receive the PCU_VERSION using tr_PCUIF_TXT_IND we must ignore the
included BTS number because the PCU_VERSION is not addressed to a specific
BTS. When we send a PCU_VERSION using ts_PCUIF_TXT_IND, we should always
use the bts number 0 to be consistent (the BSC/BTS will ignore this number
anyway).

Let's fix the usage of tr_PCUIF_TXT_IND and put comments, to make clear why
the above applies.

Change-Id: I93de261fc77806b2f817e0d30cb1b0d377ed0dbb
related: OS#6507