debug CLI command for NETCONF

Change-Id: I42e25899c42f02c1456580e19d34a4a3ea9e83a7
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 e5bf7fb..7d58b82 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -157,18 +157,21 @@
             <action class="org.onosproject.cli.net.DeviceConfigGetterCommand"/>
             <completers>
                 <ref component-id="deviceIdCompleter"/>
+                <null/>
             </completers>
         </command>
         <command>
             <action class="org.onosproject.cli.net.DeviceConfigSetterCommand"/>
             <completers>
                 <ref component-id="deviceIdCompleter"/>
+                <null/>
             </completers>
         </command>
         <command>
             <action class="org.onosproject.cli.net.DevicePortGetterCommand"/>
             <completers>
                 <ref component-id="deviceIdCompleter"/>
+                <null/>
             </completers>
         </command>
         <command>