Fix zk ensemble join and start

- Now checking during a start if curator client is
  already started, if so handle join manually. Also
  trying to start client manually.
- Fixes #187

spring-statemachine-samples/web/src/main/java/demo/web/StateMachineConfig.java

@@ -197,11 +197,11 @@ public class StateMachineConfig {
 	}
 
 	public enum States {
-	    S0, S1, S11, S12, S2, S21, S211, S212
+		S0, S1, S11, S12, S2, S21, S211, S212
 	}
 
 	public enum Events {
-	    A, B, C, D, E, F, G, H, I, J, K
+		A, B, C, D, E, F, G, H, I, J, K
 	}
 
 	private static class FooAction implements Action<States, Events> {