Add LRP TLD states to Registry and *_tld tools

Also had to add an EnumParameter class to support
List<T extends Enum<T>>, as these aren't natively supported by
JCommander (although single Enum parameters are.)

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=129464699

java/google/registry/tools/params/TldStateParameter.java

@@ -0,0 +1,23 @@
+// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
+//
+// 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 google.registry.tools.params;
+
+import google.registry.model.registry.Registry.TldState;
+
+/**
+ * {@link TldState} CLI parameter converter/validator. Required to support multi-value
+ * TldState parameters.
+ */
+public final class TldStateParameter extends EnumParameter<TldState> {}