Fixes for karaf 4.2.1 CLI annotations for dhcp relay app

Change-Id: I351a9ed4e57a8a73fa6db80d172d5120ebcde4b6
diff --git a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/cli/DhcpRelayCommand.java b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/cli/DhcpRelayCommand.java
index 694cb45..4145cd2 100644
--- a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/cli/DhcpRelayCommand.java
+++ b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/cli/DhcpRelayCommand.java
@@ -19,6 +19,7 @@
 
 import org.apache.karaf.shell.api.action.Argument;
 import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.MacAddress;
@@ -48,11 +49,13 @@
     @Argument(index = 0, name = "counter",
             description = "shows counter values",
             required = false, multiValued = false)
+    @Completion(DhcpRelayCounterCompleter.class)
     String counter = null;
 
     @Argument(index = 1, name = "reset",
             description = "reset counters or not",
             required = false, multiValued = false)
+    @Completion(DhcpRelayResetCompleter.class)
     String reset = null;