Adding command to add routes and to generate flows from them.

Enhanced FlowRuleStore and FlowRuleService with a new method.

Change-Id: I011371c1931294448e361fc1ceb120d89c14489d
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 e1abc40..7be09e8 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
@@ -50,6 +50,9 @@
         <command>
             <action class="org.onosproject.provider.nil.cli.CreateNullHost"/>
         </command>
+        <command>
+            <action class="org.onosproject.provider.nil.cli.CreateNullHosts"/>
+        </command>
     </command-bundle>
 
     <bean id="startStopCompleter" class="org.onosproject.cli.StartStopCompleter"/>