Merge pull request #32 from xerial/feature/workflow

Feature/workflow
Add src/multi-jvm/scala to the test classpath. Now sbt gen-idea works correctly
Fixed sbt settings to avoid duplicate test runnign between normal tests and multi-jvm tests. And also fixed temporary directories for barrier and zookeepers
Wait until reply is coming from the client in ScatterTest
Merge branch 'develop' into feature/workflow