For py27, allow reading and storing non-ASCII data in exports
stored as Ceph RADOS objects (This is possible with py3).
Do this by decoding binary data and encoding text data with 'utf-8'
when reading and writing RADOS export objects.
TrivialFix
Change-Id: Idcf8b1c1ed1a65e2cce19726997694d993879c14