* stable-2.15:
Upgrade testcontainers to 1.12.1
Bazel: Reuse version from .bazelversion for minimum used version check
Bazel: Add fixes for --incompatible_disallow_legacy_java_provider
Rename left over Buck prolog compiler class to Bazel
Change-Id: Ibe7b101a7c6e95a296ee8c2f01ad790d66c216d7