Updated. Build a OVSDB driver and its associated behaviors for
supporting application to create VxLAN/GRE tunnels
This code is for JIRA ONOS-2181.

Change-Id: If7f341a422620a9e885741d4cc412fad39438d89
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java
new file mode 100644
index 0000000..a0244cb
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/TunnelConfig.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.net.behaviour;
+
+import java.util.Collection;
+
+import org.onosproject.net.driver.HandlerBehaviour;
+
+/**
+ * Behaviour for handling various drivers for tunnel configuration.
+ */
+public interface TunnelConfig extends HandlerBehaviour {
+
+    /**
+     * Create a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void createTunnel(TunnelDescription tunnel);
+
+    /**
+     * Remove a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void removeTunnel(TunnelDescription tunnel);
+
+    /**
+     * Update a tunnel.
+     *
+     * @param tunnel tunnel entity
+     */
+    void updateTunnel(TunnelDescription tunnel);
+
+    /**
+     * Gets tunnels.
+     *
+     * return collection of tunnel
+     */
+    Collection<TunnelDescription> getTunnels();
+
+}