[ONOS-5070] Adds mirroring functionality.

Changes:
- Adds mirroring behaviour;
- Adds mirroring description;
- Adds mirroring name;
- Implements for Ovsdb the mirroring;
- Adds OvsdbMirror entity;
- Adds constants related to Mirror table;
- Fix one issue related to Mirror table
- Extends OvsdbClientService introducing mirroring;
- Implements mirroring functionality in DefaulOvsdbClient;
- Support for different types of device id

Change-Id: Ie291f49b3c61b7998010f555ae11deb8c021063d
diff --git a/core/api/src/main/java/org/onosproject/net/behaviour/MirroringConfig.java b/core/api/src/main/java/org/onosproject/net/behaviour/MirroringConfig.java
new file mode 100644
index 0000000..7b749a2d
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/behaviour/MirroringConfig.java
@@ -0,0 +1,53 @@
+/*
+ * 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 com.google.common.annotations.Beta;
+import org.onosproject.net.driver.HandlerBehaviour;
+
+import java.util.Collection;
+
+/**
+ * Behaviour for handling various drivers for mirroring configurations.
+ */
+@Beta
+public interface MirroringConfig extends HandlerBehaviour {
+
+    /**
+     * Adds a mirroring with a given description.
+     *
+     * @param bridge the bridge name
+     * @param mirroringDescription mirroring description
+     * @return true if succeeds, or false
+     */
+    boolean addMirroring(BridgeName bridge, MirroringDescription mirroringDescription);
+
+    /**
+     * Removes a mirroring.
+     *
+     * @param mirroringName mirroring name
+     */
+    void deleteMirroring(MirroringName mirroringName);
+
+    /**
+     * Returns a collection of MirroringStatistics.
+     *
+     * @return statistics collection
+     */
+    Collection<MirroringStatistics> getMirroringStatistics();
+
+}