CLI command that shows all subnets configured in Segment Routing

Change-Id: Ib03ec2039b763f3796548923883fc89913a1ceac
diff --git a/apps/segmentrouting/src/main/resources/OSGI-INF/blueprint/shell-config.xml b/apps/segmentrouting/src/main/resources/OSGI-INF/blueprint/shell-config.xml
index 4c13a41..65b8608 100644
--- a/apps/segmentrouting/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/apps/segmentrouting/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -37,6 +37,9 @@
         <command>
             <action class="org.onosproject.segmentrouting.cli.RerouteNetworkCommand"/>
         </command>
+        <command>
+            <action class="org.onosproject.segmentrouting.cli.DeviceSubnetListCommand"/>
+        </command>
     </command-bundle>
 </blueprint>