Add public values for serialized offsets
Add public values for serialized offsets

BinaryLogMP needs to effieciently be able to get the lastMpUniqueId from
a serialized DRConsumerDrIdTracker so add a public static variable with
the offset of the serialized lastMpUniqueId.

VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb,VoltDB/voltdb