Fixes for mariadb support.
MariaDB optimizes out order by clauses on subqueries where the enclosing query is essentially a
select * from ( ... ), which breaks show support in some cases.  Arrange to put order by clauses on
the view query, rather than on the definition of the view query.

Making ordering explicit in some tests.
Add parse plan support for alter persistent group ... with rebalance.
Merge branch 'master' into smg
Mysql encodes INT24 as four bytes on the wire, not three.
Add support for generating a binary row that is a subset of an existing row.
Rough pass at stop the world rebalance during storage gen add.