These were added when we faced significant memory pressure on the old
server. That is no longer a problem and there is an issue with the
specification that breaks file compression due to destination files
already existing. It seems like the log specification is only able to
rotate once then it cannot keep moving files aside because they already
exist as eg jvm_gc.log.0.gz. This results in annoying errors in the
Gerrit error_log.
Note that it doesn't appear sufficient to remove this log specification
we also need to move the existing jvm_gc.log* files aside or delete
them. This was tested on a held zuul node and I stopped gerrit, updated
the docker-compose file, moved the files aside, then started gerrit and
that got rid of the startup errors in error_log. Merely updating
docker-compose resulted in the same errors on startup.
Change-Id: Ied1464c57b2e8331b9bdf7cbc9ad74f92dea2dfd