do not initialise the flowext subsystem

Change-Id: I760a95a27fce91c80b5f5f3d396c80e4b0eca378

@@ -62,7 +62,7 @@ import static org.slf4j.LoggerFactory.getLogger;
 /**
  * Experimental extension to the flow rule subsystem; still under development.
  */
-@Component(immediate = true)
+@Component(immediate = false)
 @Service
 public class FlowRuleExtManager extends FlowRuleManager
         implements FlowRuleExtService {

@@ -71,7 +71,7 @@ import static org.slf4j.LoggerFactory.getLogger;
  * Implement a simple routing-like mechanism to directly send service data to its master and push to device.
  * This Router does not save any flow rule extension data in cache, it focus on routing mechanism.
  */
-@Component(immediate = true)
+@Component(immediate = false)
 @Service
 public class DefaultFlowRuleExtRouter
         implements FlowRuleExtRouter {