Change in osmo-gsm-tester[master]: Introduce parametrized scenario files support

[pespin]

Hello Jenkins Builder, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/c/osmo-gsm-tester/+/17291

to look at the new patch set (#2).

Change subject: Introduce parametrized scenario files support
......................................................................

Introduce parametrized scenario files support

The idea is to have something similar to systemd template unit files:
https://fedoramagazine.org/systemd-template-unit-files/

Specially for modifiers, one finds the situation where same scenario structure
has to be created with lots of different values.
For instance, let's say we want to test with different eNodeB num_prb values:
[6, 15, 25, 50, 75,100]
Right now we'd need to create one scenario file for each of them, for instance:
mod-enb-nprb6.conf
mod-enb-nprb15.conf
mod-enb-nprb25.conf
mod-enb-nprb50.conf
mod-enb-nprb75.conf
mod-enb-nprb100.conf

And each of them containing something like (changing the num_prb value):
"""
modifiers:
  enb:
  - num_prb: 75
"""

Instead, we can now have one unique file mod-enb-nprb at .conf:
"""
modifiers:
  enb:
  - num_prb: ${param1}
"""
The general syntax is: "scenario-name at param1,param2,param3".
So "@" splits between scenario name and parameter list, and "," splits
between parameters.

For instance, one can now run following suite with scenario:
"4g:srsenb-rftype-uhd+srsue-rftype-uhd+mod-enb-nprb at 75"

Related: OS#4424
Change-Id: Icfcba15b937225aa4b1f322a8005fcd57db1d1ca
---
M src/osmo_gsm_tester/config.py
M src/osmo_gsm_tester/template.py
2 files changed, 47 insertions(+), 7 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-tester refs/changes/91/17291/2
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Gerrit-Project: osmo-gsm-tester
Gerrit-Branch: master
Gerrit-Change-Id: Icfcba15b937225aa4b1f322a8005fcd57db1d1ca
Gerrit-Change-Number: 17291
Gerrit-PatchSet: 2
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-MessageType: newpatchset
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