ONOS-5503 Added CLIs for administering OFAgent

Change-Id: I58256316e2054952da9dce04bf927901761807e5
diff --git a/apps/ofagent/src/main/java/org/onosproject/ofagent/cli/OFAgentRemoveCommand.java b/apps/ofagent/src/main/java/org/onosproject/ofagent/cli/OFAgentRemoveCommand.java
new file mode 100644
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+++ b/apps/ofagent/src/main/java/org/onosproject/ofagent/cli/OFAgentRemoveCommand.java
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+/*
+ * Copyright 2017-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.ofagent.cli;
+
+import org.apache.karaf.shell.commands.Argument;
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.ofagent.api.OFAgent;
+import org.onosproject.ofagent.api.OFAgentAdminService;
+
+/**
+ * Removes the existing OFAgent.
+ */
+@Command(scope = "onos", name = "ofagent-remove", description = "Removes the ofagent")
+public class OFAgentRemoveCommand extends AbstractShellCommand {
+
+    @Argument(index = 0, name = "network", description = "Virtual network ID",
+            required = true, multiValued = false)
+    private long networkId = NetworkId.NONE.id();
+
+    @Override
+    protected void execute() {
+        OFAgentAdminService adminService = get(OFAgentAdminService.class);
+        OFAgent removed = adminService.removeAgent(NetworkId.networkId(networkId));
+        if (removed != null) {
+            print("Successfully removed OFAgent for network %s", networkId);
+        } else {
+            print("Failed to remove OFAgent for network %s", networkId);
+        }
+    }
+}