[WIP] Add @Service tags to all commands and completers

Change-Id: I8d6ae6185ada30a92481ddb7b603af323656dc3a
diff --git a/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullHosts.java b/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullHosts.java
index b8618e0..cf769fd 100644
--- a/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullHosts.java
+++ b/providers/null/src/main/java/org/onosproject/provider/nil/cli/CreateNullHosts.java
@@ -18,6 +18,7 @@
 
 import org.apache.karaf.shell.api.action.Argument;
 import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onlab.packet.IpAddress;
 import org.onlab.util.Tools;
 import org.onosproject.net.ConnectPoint;
@@ -34,6 +35,7 @@
 /**
  * Adds a simulated end-station host to the custom topology simulation.
  */
+@Service
 @Command(scope = "onos", name = "null-create-hosts",
         description = "Adds a simulated end-station host to the custom topology simulation")
 public class CreateNullHosts extends CreateNullEntity {