Since we provide a custom `FileNameGenerator` via `fileNameExpression` we should ensure somehow `BeanFactory` injection to that
`FileWritingMessageHandlerSpec` is a `FactoryBean` since version DSL `1.2` and a particular `BPP` takes care about `Spec` internals and register custom `FileNameGenerator` as a bean.
Use standard `FactoryBean` injection in the `lines()` flow to populate the target `FileWritingMessageHandler` to the flow
Generate pom for all project to apply SI Java DSL 1.2 GA
JIRA: https://jira.spring.io/browse/INTSAMPLES-149
Polishing - PR Comments
Polishing - Work Around DSL Issue #119
Make test compatible with Windows.
Also reset Application context `DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD`.
Since tests uses the same target resources we should be sure that they use clear foundation before running
