Move dummy Oracle interfaces to separate module
(use this module as optional dependency)
Add infrastructure to test with different types of DataSources:
- Currently supported DataSources
  - SingleConnectionDataSource (Spring)
  - Tomcat Connection Pool
  - Commons DBCP
- Configuration
  - Database coordinates and login in database.properties
    may be overwritten by a custom database_${user.name}.properties
    configuration file
  - Connection pool properties in connectionpool.properties