Fix ONOS-1594 - bogus third option when adding mpls intent via CLI

Change-Id: I30421ed347544a56e225075740974812614fd52c
diff --git a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 96a907d..5fefe45 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -294,6 +294,8 @@
             <action class="org.onosproject.cli.net.AddMplsIntent"/>
             <completers>
                 <ref component-id="connectPointCompleter"/>
+                <ref component-id="connectPointCompleter"/>
+                <null/>
             </completers>
         </command>
     </command-bundle>