Our DbSelect::where() is not (or no longer?) compatible w/ Zend_Db_Select::where().
DbStore::load() now uses Zend_Db_Select but we should definitely think about our
DbSelect::where() implementation.
fixes#7353
Fix coding standards in database schemes. Use DbAdapterFactory in all unit
tests instead of creating own adapters. Fix DbUserBackend and DbStore to use
FETCH_OBJ, instead of FETCH_ASSOC, to handle it consistently in the whole
application. Remove unnecessary table columns from the "account" scheme.
refs #4577
refs #4578
refs #4596
refs #4599
refs #4627