void resetHardDeleterTokens() throws InterruptedException, IOException, StoreException {
      hardDeleter.pause();
      hardDeleter.resume();
    }
Always returns a {@link FindTokenType#Uninitialized} token.
@param token the {@link StoreFindToken} to revalidate.
@return a {@link FindTokenType#Uninitialized} token.
ambry-store/src/test/java/com/github/ambry/store/HardDeleterTest.java