Merge branch 'stable-2.15' into stable-2.16 * stable-2.15: EventsLogCleaner: Don't use lambda to create tasks Add unified prefix '[pluginName]' to both queues and task Upgrade bazlets to latest stable-2.15 to build with 2.15.18 API Upgrade bazlets to latest stable-2.15 Upgrade bazlets to latest stable-2.14 Bazel: Migrate workspace status script to python Change-Id: I5a12b4d9e4bca952795868d9838056eff07590ab