[TASK] Provide default config for git-review

git-review is a tool that helps submitting git branches to gerrit for
review. Provide a default configuration for the TYPO3 gerrit to ease
setup.

Resolves: #72768
Releases: master
Change-Id: I37ba4fe7f5723f7f4d3a7b6b9a3961016ac37f25
Reviewed-on: https://review.typo3.org/46014


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>