set test-targets for test-run based on env vars

[andreschab90]

I want to set the test-targets for my ios test-run based on env vars. That would allow me for example to run only the tests for features which got changed in a PR as a statuscheck

example config
...
test-targets:
- $TESTTARGETS
...

[zuziaka]

Let's discuss this issue on Thursday grooming session.

[jan-goral]

Solution draft

Inside Args creating function, parse test-targers value from config.

• If parsed value denotes env variable, load variable value and use it.
• Otherwise use parsed value.