Changes

testenv: remove dead code for [testsuite] prepare=

Remove some WIP code that I intended to use for enabling the mongodb
repository before installing binary packages, to be able to dynamically
install mongodb from there. I solved it differently by just always
having mongodb in the podman image.

This was a dead code path because configs with prepare= in [testsuite]
are currently not valid, and therefore testenv refuses to use these
configs (see keys_valid_testsuite in testenv_cfg.py's verify()).

I have a different use case for running prepare= before running the
testsuite, to replace a module parameter in the testsuite's config. This
will be done in the next patch.

Change-Id: I9bed48612fad690f86017c298372dc6cea22b94b

testenv: add proper [testsuite] prepare= support

Support using prepare= in the [testsuite] section to e.g. change module
parameters:

  [testsuite]
  prepare=sed -i 's/mp_my_parameter := false/mp_my_parameter := true/' Testsuite.cfg

Move the execution time of prepare and clean scripts in
testdir.prepare() after the testsuite config has been copied to the
testdir, so it can be modified by the prepare script.

Change-Id: Ia78a4eba061e5e070f156f75eae1dfa4cede1ee3

hnbgw: Split ConnHdlr component code to its own file

Similar to what we do in most of the testsuites, split Component generic
code from test specific code.

Change-Id: I3a58c27a7472eea2421a45c31ac0145eb57a1f7e

RAN_Emulation: Introduce field ranap_connect_ind_auto_res

This field allows skipping automatic response of the connect_ind, hence
allowing ConnHdlr to totally skip it, delay it, or generate a CREF by
means of sending RAN_Conn_Prim:MSC_CONN_PRIM_DISC_REQ to RAN_Emulation,
as per ITU Q.711 Figure 8.

Change-Id: I5a69990e3a0839dd3c25c7dc66e6bcf66123fbff

hnbgw: Allow modifying RanOps during test startup

This will be used by a test to skip response to CONNECT.ind, allowing
transmission of DISCONNECT.req and hence transmitting CREF over the
wire.

Change-Id: Ib9462ba41b16375348b086d7ffe9f5755ae26f84

Convert RAN_Conn_Prim from enum to union

This will allow passing parameters in each primitive.
This is needed eg. to pass the reason in DISCONNECT.req.

Change-Id: I17994795b51efc7e6700238ddcf45594af653e42

RAN_Emulation: Allow setting reason in primitive MSC_CONN_PRIM_DISC_REQ

This allows setting a specific reason in the CREF transmitted on the
wire, other than "End user originted (0)".
A follow-up commit will add a test in HNBGW_Tests where an emulated MSC
answers with CREF reason "End user failure (0x02)".

Change-Id: I1fa1148135625d840426b52450bf52da10448471