Change log message for pushing global config map

Change:

    INFO Pushing new cluster config for bucket:[] revision:[407]

To

    INFO Pushing new global cluster config - revision:[408]

Change-Id: I1120248fc35d867f3ac89bb547ffb360c5860c08
Reviewed-on: http://review.couchbase.org/c/kv_engine/+/149843
Tested-by: Trond Norbye <trond.norbye@couchbase.com>
Reviewed-by: James Harrison <james.harrison@couchbase.com>

daemon/cccp_notification_task.cc

@@ -87,10 +87,13 @@ class CccpPushNotificationServerEvent : public ServerEvent {
 };
 
 Task::Status CccpNotificationTask::execute() {
-    LOG_INFO("Pushing new cluster config for bucket:[{}] revision:[{}]",
-             bucket.name,
-             revision);
-
+    if (bucket.type == BucketType::NoBucket) {
+        LOG_INFO("Pushing new global cluster config - revision:[{}]", revision);
+    } else {
+        LOG_INFO("Pushing new cluster config for bucket:[{}] revision:[{}]",
+                 bucket.name,
+                 revision);
+    }
     auto rev = revision;
 
     // This feels a bit dirty, but the problem is that when we had