Fix unconsumed column name warning in test_migrations.
Fix unconsumed column name warning in test_migrations.

The warning is "SAWarning: Unconsumed column names: aggregate_name"

There is no column aggregate_name in the aggregates table.

Change-Id: I3b92b3429ac3e020b9ab3f7ce10c73a4e4b93187

n0ano/ganttclient