Moved Tunnel subsystem to ONOS core incubator area.

Change-Id: I03f90b068013fbf0490af5277b33459ccc0514ec
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/IpTunnelEndPoint.java b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/IpTunnelEndPoint.java
new file mode 100644
index 0000000..a9278fc
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/IpTunnelEndPoint.java
@@ -0,0 +1,69 @@
+/*
+ * 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.incubator.net.tunnel;
+
+import java.util.Objects;
+
+import org.onlab.packet.IpAddress;
+
+import com.google.common.base.MoreObjects;
+/**
+ * Represent for a tunnel point using ip address.
+ */
+public final class IpTunnelEndPoint implements TunnelEndPoint {
+
+    private final IpAddress ip;
+
+    /**
+     * Public construction is prohibited.
+     * @param ip ip address
+     */
+    private IpTunnelEndPoint(IpAddress ip) {
+        this.ip = ip;
+    }
+
+    /**
+     * Create a IP tunnel end point.
+     * @param ip IP address
+     * @return IpTunnelEndPoint
+     */
+    public static IpTunnelEndPoint ipTunnelPoint(IpAddress ip) {
+        return new IpTunnelEndPoint(ip);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ip);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof IpTunnelEndPoint) {
+            final IpTunnelEndPoint other = (IpTunnelEndPoint) obj;
+            return Objects.equals(this.ip, other.ip);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass()).add("ip", ip).toString();
+    }
+}