Restructures database layout (sql)

This commit restructures the database layout by eliminating the garbage
Hibernate created. This commit only adjusts the "database.sql" file and the
test data scripts.
Fixes GameItemRepository

This commit fixes the GameItemReposiory `create` method. Game items
do not use automatically generated identifiers.
Converts PrizeTier and Entry repositories to JdbcTemplate
Converts PrizePool management to JdbcTemplate
Removes useless "DrawingResult" objects
Adds JdbcTemplate interface for prize draw results