StoreTest: add tests for validateMigrationMap
StoreTest: add tests for validateMigrationMap

Ignore-this: a604db63d5ffdad63e454618db39bcb1

darcs-hash:20090914160754-e018d-c9b6244441976b3391170d3171af16d8c6531a87.gz

nick0x01/dbmigrations,creswick/dbmigrations,jakubfijalkowski/dbmigrations,anton-dessiatov/dbmigrations,nathankot/dbmigrations