Add a throw-away tool to remove IP addresses of external hosts

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121279715

java/google/registry/tools/ExecuteEppCommand.java

@@ -47,7 +47,7 @@ final class ExecuteEppCommand extends MutatingEppToolCommand {
   private static InputStream stdin = System.in;
 
   @Override
-  void initMutatingEppToolCommand() throws IOException {
+  protected void initMutatingEppToolCommand() throws IOException {
     if (mainParameters.isEmpty()) {
       addXmlCommand(
           clientIdentifier, CharStreams.toString(new InputStreamReader(stdin, UTF_8)));