In comments given automatically by abandon_old_reviews.sh script
there was still Jenkins mentioned as CI tool.
We are using Zuul for very long time and "zuul" user is voting
now instead of "jenkins" so this patch updates those commit
messages to make this messages correct.
TrivialFix
Change-Id: Iad119108ea82b47ac2a66b9f6f8a8bb56b57e7b6