Merge branch 'feature/jorgen.lind/2_3_5_final_commits' into '2.3'

Make build_script.sh python virtual env safe

See merge request !618
3 jobs for !618 with feature/jorgen.lind/2_3_5_final_commits into 2.3 in 32 minutes and 12 seconds (queued for 4 minutes and 58 seconds)
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