* stable-3.1:
Replace documentation of gerrit.ui with gerrit.enableGwtUi
Use the environment variables provided by the GerritCodeReview-plugin
DeleteZombieCommentsRefsTest: Open RevWalk in try-with-resource
Documentation: Mention unused_deps with buildifier
Bazel: Remove bazel version check
Documentation: Recommend Bazelisk to launch bazel
Add a pgm to delete dead draft comments refs
Change-Id: I78758c7168b7374b491413dcc7f130df3d9dfd58