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> {

spring-statemachine-zookeeper/src/main/java/org/springframework/statemachine/zookeeper/ZookeeperStateMachineEnsemble.java

@@ -134,6 +134,11 @@ public class ZookeeperStateMachineEnsemble<S, E> extends StateMachineEnsembleObj
 			}
 		}
 		curatorClient.getConnectionStateListenable().addListener(connectionListener);
+		if (curatorClient.getState() == CuratorFrameworkState.STARTED) {
+			handleZkConnect();
+		} else {
+			curatorClient.start();
+		}
 	}
 
 	@Override