ONOS-6034 Added purge and sync flow rules CLIs

Also removed unnecessary boxing from RoutingSnatHandler

Change-Id: Ibb0a1e5dc6465bbf378bf7d105e162f429f6c02a
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/cli/OpenstackSyncRulesCommand.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/cli/OpenstackSyncRulesCommand.java
new file mode 100644
index 0000000..30b040c
--- /dev/null
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/cli/OpenstackSyncRulesCommand.java
@@ -0,0 +1,41 @@
+/*
+ * 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.openstacknetworking.cli;
+
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.openstacknode.OpenstackNodeService;
+
+/**
+ * Re-installs flow rules for OpenStack networking.
+ */
+@Command(scope = "onos", name = "openstack-sync-rules",
+        description = "Re-installs flow rules for OpenStack networking")
+public class OpenstackSyncRulesCommand extends AbstractShellCommand {
+
+    @Override
+    protected void execute() {
+        // All handlers in this application reacts the node complete event and
+        // tries to re-configure flow rules for the complete node.
+        OpenstackNodeService nodeService = AbstractShellCommand.get(OpenstackNodeService.class);
+        if (nodeService == null) {
+            error("Failed to re-install flow rules for OpenStack networking.");
+            return;
+        }
+        nodeService.completeNodes().forEach(nodeService::processCompleteState);
+        print("Successfully requested re-installing flow rules.");
+    }
+}