Moved Tunnel subsystem to ONOS core incubator area.

Change-Id: I03f90b068013fbf0490af5277b33459ccc0514ec
diff --git a/pom.xml b/pom.xml
index 009a5ea..93e7330 100644
--- a/pom.xml
+++ b/pom.xml
@@ -361,6 +361,11 @@
                 <scope>test</scope>
             </dependency>
 
+            <dependency>
+                <groupId>org.onosproject</groupId>
+                <artifactId>onos-incubator-api</artifactId>
+                <version>${project.version}</version>
+            </dependency>
 
             <dependency>
                 <groupId>org.onosproject</groupId>