Add [] to export domain lists to GCS

The ExportDomainListsAction [] has a cron entry that runs it twice per day.  It exports one flat text file per real (non-test) TLD to the "{project-id}-domain-lists" bucket in Google Cloud Storage, overwriting the existing ones in place.  Each file is a newline-delimited list of active (non-deleted) domains in that TLD.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=116767987

java/com/google/domain/registry/config/TestRegistryConfig.java

@@ -52,6 +52,11 @@ public class TestRegistryConfig implements RegistryConfig {
     return getProjectId() + "-snapshots";
   }
 
+  @Override
+  public String getDomainListsBucket() {
+    return getProjectId() + "-domain-lists";
+  }
+
   @Override
   public String getSnapshotsDataset() {
     return "snapshots";