Add scrap tool to remove transfer data

We have wound up with a few domains with invalid transfer data; the transfer status is SERVER_CANCELLED, but the other data is missing. This tool should set the transfer data for the specified domain back to null in the database.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=140883792

java/google/registry/tools/RegistryTool.java

@@ -15,6 +15,7 @@
 package google.registry.tools;
 
 import com.google.common.collect.ImmutableMap;
+import google.registry.tools.javascrap.RemoveDomainTransferDataCommand;
 import google.registry.tools.javascrap.RemoveIpAddressCommand;
 
 /** Container class to create and run remote commands against a datastore instance. */
@@ -94,6 +95,7 @@ public final class RegistryTool {
           .put("publish_detail_report", PublishDetailReportCommand.class)
           .put("registrar_activity_report", RegistrarActivityReportCommand.class)
           .put("registrar_contact", RegistrarContactCommand.class)
+          .put("remove_domain_transfer_data", RemoveDomainTransferDataCommand.class)
           .put("remove_ip_address", RemoveIpAddressCommand.class)
           .put("resave_entities", ResaveEntitiesCommand.class)
           .put("resave_environment_entities", ResaveEnvironmentEntitiesCommand.class)

java/google/registry/tools/javascrap/RemoveDomainTransferDataCommand.java

@@ -0,0 +1,51 @@
+// Copyright 2016 The Nomulus 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.javascrap;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static google.registry.model.EppResourceUtils.loadByForeignKey;
+import static org.joda.time.DateTimeZone.UTC;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.Parameters;
+import google.registry.model.domain.DomainResource;
+import google.registry.model.transfer.TransferData;
+import google.registry.tools.MutatingCommand;
+import java.util.List;
+import org.joda.time.DateTime;
+
+/**
+ * Scrap tool to remove domain transfer data.
+ *
+ * <p>A bug has caused some domains to have invalid transfer data; the status is SERVER_CANCELLED,
+ * but other fields such as the gaining and losing registrar are blank. Since there was never an
+ * actual transfer, the proper course of action is to remove the invalid data. See b/33289763.
+ */
+@Parameters(separators = " =", commandDescription = "Remove transfer data.")
+public class RemoveDomainTransferDataCommand extends MutatingCommand {
+
+  @Parameter(description = "Fully-qualified domain names", required = true)
+  private List<String> mainParameters;
+
+  @Override
+  protected void init() throws Exception {
+    DateTime now = DateTime.now(UTC);
+    for (String domainName : mainParameters) {
+      DomainResource domain = loadByForeignKey(DomainResource.class, domainName, now);
+      checkNotNull(domain);
+      stageEntityChange(domain, domain.asBuilder().setTransferData(TransferData.EMPTY).build());
+    }
+  }
+}