Make ZoneAwareLoadBalancer's rule object for each zone configurable. Avoid duplicated connection priming at client initialization.
Merge commit '883899d85d1b9536211a3b45591ab7de62a21048'
Make sure ZoneAwareLoadBalancer.setRule clones the rule to load balancers for each zone.
Make sure ping thread runs and set all servers alive before running junit.
Merge pull request #10 from allenxwang/master

Make ZoneAwareLoadBalancer's rule object for each zone configurable. Avoid duplicated connection priming at client initialization.