This is the first step to making it easy to add new automation.
We can leverage our existing build infra to easily make small gains in our
existing automation (update-seeds chosen as a proof-of-concept):

• Automation timeouts are now configurable rather than hidden away in Teamcity
• Improved readability of the automation logic compared to the current switch-case in a bash file.
• If needed, build templates can be leveraged for automated commit builds as well.

The next step is to integrate preparation of the git commit into the config, along with
the necessary machinary to make that happen.

Test (this is a dry-run by default):

export SEEDS_MAIN=path/to/mainnet/dnsseed.dump
export SEEDS_TEST=path/to/testnet/dnsseed.dump
COMMIT_TYPE=update-seeds ./automated-commits.sh -p HEAD
git show   # verify man pages were updated and committed