Merge branch 'stable-2.14' into stable-2.15
* stable-2.14:
Align Eclipse compiler settings with core Gerrit's
WORKSPACE: Make commented out lines spaces indent consistent
Add IT test
FilesystemDeleteHandler: Use more readable name for trash folder
Configure whether to allow user to select preserve
Introduce an archiving mechanism for deleted repos
bazlets: Replace native.git_repository with skylark rule
Harmonize external dependency names to use hyphen
Upgrade mockito to 2.23.0
Update bazlets to latest stable-2.14 to build with 2.14.15 API
Update bazlets to latest stable-2.14 to build with 2.14.14 API
Update bazlets to latest stable-2.14 to build with 2.14.13 API
FilesystemDeleteHandler: Don't instantiate event if there are no listeners
FilesystemDeleteHandler: Rename deletedListener to deletedListeners
DatabaseDeleteHandler.java: Remove unused Provider<InternalChangeQuery>
Add RecursiveDeleteOption.ALLOW_INSECURE for recursive deletion
Simplify DeleteTrashFolder
DeleteTrashFolders: Extract predicate to its own class
Add unit test for DeleteTrashFolders
Update bazlets to latest stable-2.14 to use 2.14.12 API
Migrate `tools/bazel.rc` to `.bazelrc`
Tidy up FilesystemDeleteHandler
Add unit tests for FilesystemDeleteHandler
Extract deletion preconditions to its own class
Change-Id: Iba2e175783cf18ace0329efe81fc417640f77aa0
