* stable-3.0:
Post/Delete GPG keys: Do not return 409 Conflict if an error occurred
DeleteRef: Do not return 409 Conflict if an error occurred
DeleteRef: Do not log an error if user attempted to delete the current branch
Init: Increase severity log level to error on exceptions
Bazel: Fix genrule2 to clean up temporary folder content
AbstractIndexTests: Inline constant assertChangeQuery string parameter
AbstractIndexTests: Align assertChangeQuery method access with its use
AbstractIndexTests: Provide default configureIndex method implementation
XContentBuilder: Use JsonFactory.builder() and new feature enums
Change-Id: Id3499febf123f2f3aa872d589b5df478d1d66b63
31f45164e9