Add signature marker and version to NormalizedNode streaming

Add signature marker and version to NormalizedNode streaming

For backwards compatibility, in some message classes, when
de-serializing, we first try the new NormalizedNode streaming and if
that fails we try the pre-Lithium protobuff de-serialization. However,
we're relying on an IOException from the NormalizedNode streaming or it
returning null which may not be reliable. In addition if protobuff fails
as well we can't tell if it's a bad protobuff or streamed message and we
squash the streaming exception. We don't want to masking streaming failures
as that's what will be used going forward.

To alleviate this, NormalizedNodeOutputStreamReader now writes an initial byte
as a signature marker to identify it as a valid stream.
NormalizedNodeInputStreamReader reads it, and if invalid, throws an
exception. This is caught by SerializationUtils as an indication to try
the legacy protobuff de-serialization.

Also, I added a version number to the output stream so we can handle
future changes for backwards compatibility.

Change-Id: I19779aa83c33eadc6bf83adfe6aae0b9a27cdfae
Signed-off-by: tpantelis <tpanteli@brocade.com>