TL;DR: Check out .test-infra/jenkins/REAMDE.md <https://github.com/apache/beam/blob/master/.test-infra/jenkins/README.md> for Beam Jenkins job summary!
Hi folks, I found it's difficult for me to quickly find particular Jenkins job link or PR trigger phrase during development and PR review. So I collected some useful job information from groovy files and put them in .test-infra/jenkins/REAMDE.md <https://github.com/apache/beam/blob/master/.test-infra/jenkins/README.md>. And also linked this file from PR template <https://github.com/apache/beam/blob/master/.github/PULL_REQUEST_TEMPLATE.md>. Due to large number of jobs we currently running, I group them into few tables: PreCommit, PopstCommit, Performance, Inventory and Others. Hopefully this's clear and also helpful to other contributors. Since the README is generated based on current state of Jenkins groovy files, so unfortunately any further changes won't be reflected there without manual update. Thanks, Mark
