[Branch-2-7] Roll back to using Java 8 for docker images #12357
Merged
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Motivation
In #12017 the base image for Docker images was changes by cherry-picking a change from 2.8. The reason was that the old image was not working anymore in the docker build, since some of the apt-get repos stopped working.
The side effect was that 2.7 branch was switched to Java 11 runtime in the Docker image, something that we should not do in a patch release.