[ONOS-4795] NETCONF function for FUJITSU OLT #3

[Done]
- Add vOLT ponlink commands for FUJITSU OLT
- Add new implementation with respect to the commands
- Move those commands to Fujitsu drivers directory
- Modify BUCK to avoid an error

Change-Id: I7a61234e18367aa74445800dd09f98c10edc35c4
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/VoltPonLinkConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/VoltPonLinkConfig.java
new file mode 100644
index 0000000..eeb3c01
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/VoltPonLinkConfig.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2016-present 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 org.onosproject.net.driver.HandlerBehaviour;
+
+/**
+ * Device behaviour to obtain and set parameters of PON links in vOLT.
+ */
+public interface VoltPonLinkConfig extends HandlerBehaviour {
+
+    /**
+     * Obtain all GPON PON links or a specific PON link in the device.
+     *
+     * @param target input data in string
+     * @return response string
+     */
+    String getPonLinks(String target);
+
+    /**
+     * Set a parameter value of PON link in the device.
+     *
+     * @param target input data in string
+     *
+     */
+    void setPonLink(String target);
+
+}