fix(PipelineBaseTest): callstackdump should be updated if callstack is changed

[stchar]

dumpCallStask should respect helper.callStack if it was changed.

fixes #664

Testing done

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[nre-ableton]

Looks great, thanks!

[nre-ableton]

(BTW, I'll try to make a release this week, but I'm quite busy the next few days).