TriggerMenuMT: Fix JSON generation during CI tests
- One cannot rely on the
$AtlasVersion
environment variable. Instead get the release number from the release metadata file. - Also adjust the JSON file name to follow the current convention, i.e.
first menu name then release number and separated by
_
. - Store the actual menu name rather than the file name in the JSON file.
Fixes ATR-20096.
Edited by Frank Winklmeier