MB-10209: Datatype should be picked up by replicas

- Include datatype while shipping a MUTATION through
TAP.

Change-Id: I4a79857185cc5d24ae873f2dee270f970ca69eba
Reviewed-on: http://review.couchbase.org/33894
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>