Detangling incubator: virtual nets, tunnels, resource labels, oh my

- virtual networking moved to /apps/virtual; with CLI & REST API
- tunnels and labels moved to /apps/tunnel; with CLI & REST API; UI disabled for now
- protobuf/models moved to /core/protobuf/models
- defunct grpc/rpc registry stuff left under /graveyard
- compile dependencies on /incubator moved to respective modules for compilation
- run-time dependencies will need to be re-tested for dependent apps

- /graveyard will be removed in not-too-distant future

Change-Id: I0a0b995c635487edcf95a352f50dd162186b0b39
diff --git a/apps/tunnel/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceRequest.java b/apps/tunnel/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceRequest.java
new file mode 100644
index 0000000..776e068
--- /dev/null
+++ b/apps/tunnel/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceRequest.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.resource.label;
+
+import java.util.Collection;
+import java.util.Objects;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.DeviceId;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableSet;
+
+/**
+ * Represents for a label request.
+ */
+@Beta
+public class LabelResourceRequest {
+
+    private final DeviceId deviceId;
+    private final Type type;
+    private final long applyNum;
+    private ImmutableSet<LabelResource> releaseCollection;
+
+    /**
+     * Creates LabelResourceRequest object.
+     * @param deviceId device identifier
+     * @param type request type
+     * @param applyNum apply the number of labels
+     * @param releaseCollection Set of released label
+     */
+    public LabelResourceRequest(DeviceId deviceId,
+                                Type type,
+                                long applyNum,
+                                ImmutableSet<LabelResource> releaseCollection) {
+        this.deviceId = deviceId;
+        this.type = type;
+        this.applyNum = applyNum;
+        this.releaseCollection = releaseCollection;
+    }
+    /**
+     * Returns a device id.
+     * @return DeviceId
+     */
+    public DeviceId deviceId() {
+        return deviceId;
+    }
+
+    /**
+     * Returns request type.
+     * @return Type
+     */
+    public Type type() {
+        return type;
+    }
+
+    /**
+     * Returns apply label number.
+     * @return label number
+     */
+    public long applyNum() {
+        return applyNum;
+    }
+
+    /**
+     * Returns the collection of release labels.
+     * @return Collection of DefaultLabelResource
+     */
+    public Collection<LabelResource> releaseCollection() {
+        return releaseCollection;
+    }
+
+    /**
+     * Request type.
+     */
+    public enum Type {
+        APPLY, //apple label request
+        RELEASE //release label request
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.deviceId, this.applyNum, this.type,
+                            this.releaseCollection);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof LabelResourceRequest) {
+            LabelResourceRequest that = (LabelResourceRequest) obj;
+            return Objects.equals(this.deviceId, that.deviceId)
+                    && Objects.equals(this.applyNum, that.applyNum)
+                    && Objects.equals(this.type, that.type)
+                    && Objects.equals(this.releaseCollection,
+                                      that.releaseCollection);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this).add("deviceId", this.deviceId)
+                .add("applyNum", this.applyNum).add("type", this.type)
+                .add("releaseCollection", this.releaseCollection).toString();
+    }
+}