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/virtual/app/src/main/java/org/onosproject/incubator/net/virtual/store/impl/primitives/VirtualFlowRule.java b/apps/virtual/app/src/main/java/org/onosproject/incubator/net/virtual/store/impl/primitives/VirtualFlowRule.java
new file mode 100644
index 0000000..ea64904
--- /dev/null
+++ b/apps/virtual/app/src/main/java/org/onosproject/incubator/net/virtual/store/impl/primitives/VirtualFlowRule.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2017-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.virtual.store.impl.primitives;
+
+import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.net.flow.FlowRule;
+
+import java.util.Objects;
+
+/**
+ * A wrapper class to encapsulate flow rule.
+ */
+public class VirtualFlowRule {
+    NetworkId networkId;
+    FlowRule rule;
+
+    public VirtualFlowRule(NetworkId networkId, FlowRule rule) {
+        this.networkId = networkId;
+        this.rule = rule;
+    }
+
+    public NetworkId networkId() {
+        return networkId;
+    }
+
+    public FlowRule rule() {
+        return rule;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(networkId, rule);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (this ==  other) {
+            return true;
+        }
+
+        if (other instanceof VirtualFlowRule) {
+            VirtualFlowRule that = (VirtualFlowRule) other;
+            return this.networkId.equals(that.networkId) &&
+                    this.rule.equals(that.rule);
+        } else {
+            return false;
+        }
+    }
+}
+
+