Low level openflow drivers have been promoted to the driver subsystem.

All new device drivers should provide a handshaking behaviour as well
as well as a pipeline behaviour.

Change-Id: I883830b074e5d254a8cc6100e6c4fa0023594a36
diff --git a/openflow/api/pom.xml b/openflow/api/pom.xml
index dd8f582..efdba83 100644
--- a/openflow/api/pom.xml
+++ b/openflow/api/pom.xml
@@ -42,6 +42,11 @@
             <groupId>io.netty</groupId>
             <artifactId>netty</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-api</artifactId>
+        </dependency>
+
     </dependencies>
 
     <build>