Merge pull request #236 from tbak/features/EurekaClients_update

2.x EurekaClients should return EurekaClient instance, not an observable of it
ServerResolver lazy startup.
Merge pull request #237 from tbak/2.x

2.x InstanceInfo model update.
Merge branch '2.x' into features/server_resolver_lazy

Conflicts:
	rx-eureka-client/src/main/java/com/netflix/rx/eureka/client/bootstrap/EurekaServerResolver.java