HBASE-12414 Move HFileLink.exists() to base class
HBASE-12423 Use a non-managed Table in TableOutputFormat (Solomon Duskis)
HBASE-8572 Enhance delete_snapshot.rb to call snapshot deletion API with regex

Signed-off-by: stack <stack@apache.org>
HBASE-12363 Improve how KEEP_DELETED_CELLS works with MIN_VERSIONS.