Implementing net config subsystem and revising its interfaces.

Added a few basic configs for device, host and links.

Added initial REST API.

Added CLI.

Tests remain to be added.

Change-Id: Ic7bba4b5ad7d553c51d69f6459b3bff146970323
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 7263534..ca470e3 100644
--- a/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
+++ b/cli/src/main/resources/OSGI-INF/blueprint/shell-config.xml
@@ -51,6 +51,14 @@
         </command>
 
         <command>
+            <action class="org.onosproject.cli.cfg.NetworkConfigRegistryCommand"/>
+        </command>
+
+        <command>
+            <action class="org.onosproject.cli.cfg.NetworkConfigCommand"/>
+        </command>
+
+        <command>
             <action class="org.onosproject.cli.MetricsListCommand"/>
         </command>