A few improvements to Eureka CLI, to speed up manual testing process.
Implement interest channel upgrade.
Merge remote-tracking branch 'remotes/netflix/2.x' into tbak/2.x

Conflicts:
	eureka-test-utils/src/main/java/com/netflix/eureka/cmd/EurekaCLI.java
Fix bug in InterestNotificationMultiplexer.
Implement AwsDataCenterInfo provider.
Merge pull request #194 from tbak/2.x

2.x Interest channel upgrade
Implement bootstrap resolvers.
EurekaServerResolver still neds to be done + some extensions to StaticServerResolver are required.
Disable failing test that depends on DNS access.
Merge pull request #195 from tbak/2.x

2.x Implement AwsDataCenterInfo provider + bootstrap resolvers.
Implement composite interest index as an aggregate of atomic indexes.
Initial client-side interest impl
Removing need for lock in EurekaClient
Merge pull request #196 from qiangdavidliu/2.x

Initial client-side interest impl
Use Ribbon transport in eureka-client.
Merge tbak/2.x with netflix/2.x

Conflicts:
	eureka-core/src/main/java/com/netflix/eureka/interests/IndexRegistry.java
Increase timeouts in test.
Reimplement InterestNotificationMultiplexer to be thread safe.
Fix InterestNotificationMultiplexer implementation.
Yet another InterestNotificationMultiplexer implementation.
Minor server resolver update.