XD-439: stream directory hooked up to parser
Merge branch 'xd439' of https://github.com/aclement/spring-xd into aclement-xd439
XD-439 Add deletion of stream and stream defintions before and after each test method is run to avoid test vailures due to existing state in the repository.

Merge branch 'xd439' of https://github.com/aclement/spring-xd into aclement-xd439