[TASK] Have bamboo plan updates and minor ac test stabilization

* bamboo composer environment is a9.3.0@dev
* Adapt a test result parsing to slightly changed git
  output in younger versions
* Raise a timeout when installing introduction package in ac
  tests for less false positives.

Resolves: #84944
Releases: master
Change-Id: I3f0ec103985a96d05d4a42fab8edd92fad219114
Reviewed-on: https://review.typo3.org/56883


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>