Add financial block entity and sql file to track those blocks which may affect the cost of a conference depending on the price
 - Also build in relation of those details to the block itself, both in java and SQL
Add financial details sql file to main db build script
Redefine One-to-One mappings so that the parent table actually holds the ID to the child table for cleaner code and slightly (maybe trivially) higher performance
Merge branch 'payment-database-schema' of http://github.com/CruGlobal/conf-registration-api into payment-database-schema