Eng 6718 dr ddl

This has the effect of taking your original shorthand of DRing all the tables and then disabling one or two and replacing it with the explicit DR of every DR'd table.  Anyone adding tables may not get the behavior they were originally intending ("Oh, I already told the database to DR everything exception table FOO, so I don't need to do anything with this new table I've created!").  Instead, anyone creating a new table using live DDL will have to explicitly turn DR on for that table as well.  Worth at least a doc mention or release note if this is how we want to go.