Delay the timing to connect SilkClient
Add ClusterTest
add comment
Extract common codes
Add ClusterSpec for 2, 3 and 4 nodes
Suprress error messege when testing durability of ZooKeeper
Fix run Function0 test
supress log messages
fix timing
Do not delete ClassBox jars so that multiple test can work
Deleyed the deletion of tmp folders of StandaloneCluster, so that ClassBox jars will be found by the other tests