/lu/dev: adding agg model changes from 6590 which is missing after 6591.
/lu/dev: adding agg model changes from 6590 which is missing after 6591.

[git-p4: depot-paths = "//open/lu/dev/": change = 6593]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb