[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/providers/pom.xml b/providers/pom.xml
index 7552de9..87dd565 100644
--- a/providers/pom.xml
+++ b/providers/pom.xml
@@ -38,6 +38,7 @@
         <module>netconf</module>
         <module>null</module>
         <module>pcep</module>
+        <module>ovsdb</module>
     </modules>
 
     <dependencies>