ONOS-3503 Remove OchPort out of core.

- Implementation of a Behavior OpticalDevice has the knowledge of
  translating annotations into optical specific port.
- OpticalDeviceServiceView checks if the Device is a OpticalDevice
  and translate all the Ports to optical specific port before returning.

- This commit contains feedbacks, issues, and fixes by Michele Santuari.

- Note: 3 more Port types to go (OduClt, Oms, Otu)

Change-Id: I4cbda8bc1922fbdd4dac8de8d02294bad74b8058
diff --git a/core/api/src/main/java/org/onosproject/net/optical/package-info.java b/core/api/src/main/java/org/onosproject/net/optical/package-info.java
new file mode 100644
index 0000000..fbb4d4e
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/optical/package-info.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2016 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.
+ */
+
+// Note: this package sub-tree will be moved out from onos-api bundle soon.
+/**
+ * Optical augmentation classes.
+ */
+package org.onosproject.net.optical;