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/domain/IntentResource.java b/apps/tunnel/api/src/main/java/org/onosproject/incubator/net/domain/IntentResource.java
new file mode 100644
index 0000000..aa6aef4
--- /dev/null
+++ b/apps/tunnel/api/src/main/java/org/onosproject/incubator/net/domain/IntentResource.java
@@ -0,0 +1,88 @@
+/*
+ * 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.domain;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.ConnectPoint;
+
+
+/**
+ * The abstract base class for the resource that satisfies an intent primitive.
+ */
+@Beta
+public abstract class IntentResource {
+
+    private final IntentPrimitive primitive;
+
+    private final ApplicationId appId;
+    private final ConnectPoint ingress;
+    private final ConnectPoint egress;
+
+    //* QUESTIONABLE ADDITIONS *//
+
+    // TODO add other common fields
+    //String ingressTag;
+    //String egressTag;
+    //etc.
+
+    public IntentResource(IntentPrimitive primitive, ApplicationId appId,
+                          ConnectPoint ingress, ConnectPoint egress) {
+        this.appId = appId;
+        this.ingress = ingress;
+        this.egress = egress;
+        this.primitive = primitive;
+    }
+
+    //TODO when is same package tunnelID should be of type tunnelID and netTunnelId not long.
+
+
+    /**
+     * Returns the intent primitive associated with this resource at creation.
+     *
+     * @return this resource's intent primitive.
+     */
+    public IntentPrimitive primitive() {
+        return primitive;
+    }
+
+    /**
+     * Returns the application ID associated with this resource at creation.
+     *
+     * @return this resource's application ID.
+     */
+    public ApplicationId appId() {
+        return appId;
+    }
+
+    /**
+     * Returns the ingress connect point associated with this resource at creation.
+     *
+     * @return this resource's ingress connect point.
+     */
+    public ConnectPoint ingress() {
+        return ingress;
+    }
+
+    /**
+     * Returns the egress connect point associated with this resource at creation.
+     *
+     * @return this resource's connect point.
+     */
+    public ConnectPoint egress() {
+        return egress;
+    }
+}