Merge pull request #202 from tbak/2.x

2.x Eureka Read server + embedded cluster
Some more unit tests
Fix bug in client side interestChannelImpl not propagating delta
- Do not subscribe to client channel stream for all users
- fix test failures (change in behaviour to close(), define behaviour first)
Merge pull request #204 from qiangdavidliu/2.x

Fix bug in client side interestChannelImpl not propagating delta
Add runCluster task to gradle.