Test added.

I tried to find a solution myself but there was some fundamental changes.
SchemaMigrator line 180: There is check (tableInformation == null) in second tables loop. In my case it isn't big problem. All updates scripts for constraints (applyIndexes, applyUniqueKeys and applyForeignKeys) can be generated with precondition "drop if exist".

I can make this changes myself but I don't know other cases, when (tableInformation == null) realy is big problem.