FARRAGO: dtbug #2122: enum DatabaseProduct.UNKNOWN was being referenced                 before being instanciated in SqlDialect. Fixed it by making                 sure enum instance is created before being referenced.
FARRAGO: dtbug #2122: enum DatabaseProduct.UNKNOWN was being referenced
                before being instanciated in SqlDialect. Fixed it by making
                sure enum instance is created before being referenced.

[git-p4: depot-paths = "//open/dt/dev/": change = 13722]

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