Revise JDBC repositories to use `JdbcAggregateTemplate` for queries

[mp911de]

JDBC repositories exclusively use individual low-level components such as JdbcTemplate, JdbcConverter and such to run repository queries (except for SimpleJdbcRepository). This story ticket aggregates multiple tasks to revise that support to use the Template directly.

Pre-requisites:

• Add repositoryBasseClass and jdbcAggregateOperationsRef to @EnableJdbcRepositories #687
• Look up RelationalMappingContext in JdbcRepositoryFactoryBean.afterPropertiesSet() instead of @Autowired [DATAJDBC-425] #646
• Add Query and Criteria support to JdbcAggregateTemplate [DATAJDBC-523] #743

Follow-up:

• Move the assembly from JdbcRepositoryFactoryBean to the JdbcRepositoryFactory #373
• Simplify dependencies for JdbcEntityTemplate similar to DATAJDBC-140 [DATAJDBC-141] #374

Related, using multiple infrastructure components (such as #544, #994) will become much easier.