RawLocalFileSystem#rename does not correctly enforce replacement of empty destination directory on all platforms

POSIX rename semantics state that renaming a source directory to an existing destination directory that is empty will act as a full replacement of that existing destination. RawLocalFileSystem#rename calls Java's File#renameTo, which provides these semantics on most platforms. On some platforms (notably Windows), File#renameTo does not provide this behavior. This causes problems for MapReduce and other downstream components like Hive, HCatalog, and Sqoop that depend on the replacement behavior.