Fixed #946, route rule should always run when changed, but should only run at...

Fixed #946, route rule should always run when changed, but should only run at every invoke when RUNTIME_KEY is true.

dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java

@@ -75,7 +75,7 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
         if (localRouters != null && localRouters.size() > 0) {
             for (Router router : localRouters) {
                 try {
-                    if (router.getUrl() == null || router.getUrl().getParameter(Constants.RUNTIME_KEY, true)) {
+                    if (router.getUrl() != null && router.getUrl().getParameter(Constants.RUNTIME_KEY, false)) {
                         invokers = router.route(invokers, getConsumerUrl(), invocation);
                     }
                 } catch (Throwable t) {

dubbo-registry/dubbo-registry-api/src/main/java/com/alibaba/dubbo/registry/integration/RegistryDirectory.java

@@ -446,7 +446,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
         List<Router> routers = getRouters();
         if (routers != null) {
             for (Router router : routers) {
-                if (router.getUrl() != null && !router.getUrl().getParameter(Constants.RUNTIME_KEY, true)) {
+                if (router.getUrl() != null) {
                     invokers = router.route(invokers, getConsumerUrl(), invocation);
                 }
             }