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/ConfigModule.java

@@ -82,6 +82,12 @@ public final class ConfigModule {
     return config.getCommitLogDatastoreRetention();
   }
 
+  @Provides
+  @Config("domainListsGcsBucket")
+  public static String provideDomainListsGcsBucket(RegistryConfig config) {
+    return config.getDomainListsBucket();
+  }
+
   /**
    * Maximum number of commit logs to delete per transaction.
    *