Embedded cluster/integration tests update.
Merge pull request #309 from tbak/2.x

2.x Embedded cluster/integration tests update.
Remove eureka-ocelli module (will stay in ocelli project).
Unit test update.
Merge pull request #310 from tbak/2.x

2.x Remove eureka-ocelli module (will stay in ocelli project).
[Gradle Release Plugin] - pre tag commit:  '2.0.0-DP4'.
[Gradle Release Plugin] - new version commit:  '2.0.0-DP5-SNAPSHOT'.
Simplifying and standardizing retryable channels
Updates
Merge branch 'channel-refactor' of https://github.com/qiangdavidliu/eureka into channel-refactor
Moving Client Registry inside InterestChannelImpl (client side) to help with
dealing with ordering.