Enhancing null providers for use in demos.

Change-Id: I079d19a98fba2312bd4b17d2e275b34f4dee6f19
diff --git a/providers/null/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/providers/null/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 74bf0d2..0ac6e09 100644
--- a/providers/null/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/providers/null/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -41,6 +41,12 @@
                 <null/>
             </completers>
         </command>
+        <command>
+            <action class="org.onosproject.provider.nil.cli.CreateNullDevice"/>
+        </command>
+        <command>
+            <action class="org.onosproject.provider.nil.cli.CreateNullLink"/>
+        </command>
     </command-bundle>
 
     <bean id="startStopCompleter" class="org.onosproject.cli.StartStopCompleter"/>