[ONOS-2261] - OVSDB -- Create the implementation of DeviceProvider using
OVSDB protocol.
1.Notify the Device System when the ovsdb node is connected.
2.Notify the Device System when the ovsdb node is disconected.

Change-Id: Iff795bfaca624bf957eb1c17626dfb56e241550a
diff --git a/pom.xml b/pom.xml
index 485eed2c..a8564ab 100644
--- a/pom.xml
+++ b/pom.xml
@@ -51,6 +51,7 @@
         <module>features</module>
         <module>tools/package/archetypes</module>
         <module>tools/package/branding</module>
+        <module>ovsdb</module>
     </modules>
 
     <url>http://onosproject.org/</url>