Init annotation for methods that should be called after properties are set but before another use.
Support for JPA
* configurable value generators for stress test
* specific/ directory with JARs that are not plugin-dependent but should be loaded using plugin's classloader
* JPA key & value generator + several testing types in new JPA submodule
* CheckDataStage can test data from StressTest (fixed issue with buckets)
* BucketPolicy for selection of the bucket used in StressTest
Mapper for testing JDBC String based store