Remove unneeded "requester" from publishDnsUpdates locking

This is a quick fix we can hopefully get out fast before fixing the underlying problem.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=163485468

java/google/registry/dns/PublishDnsUpdatesAction.java

@@ -81,7 +81,7 @@ public final class PublishDnsUpdatesAction implements Runnable, Callable<Void> {
     // false. We need to make sure to take note of this error; otherwise, a failed lock might result
     // in the update task being dequeued and dropped. A message will already have been logged
     // to indicate the problem.
-    if (!executeWithLocks(this, getClass(), tld, timeout, lockName)) {
+    if (!executeWithLocks(this, null, tld, timeout, lockName)) {
       throw new ServiceUnavailableException("Lock failure");
     }
   }