Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Bazel: Add fixes for --incompatible_load_{java|python}_rules_from_bzl
  Bazel: Bump minimum supported version to 0.29.0
  Lucene index configuration and docs.

Change-Id: I6c597cbc89fafece83c374e9b36c4c4c0126704f
tree: 122fe84b50cd9db41a886b7760a78a6a623702a1
  1. java/
  2. javatests/