@Test void setsCacheControlOnAutocompleteKeysEndpoint() throws Exception {
    assertThat(get("/api/v2/autocompleteKeys").header("Cache-Control"))
      .isEqualTo("max-age=300, must-revalidate");
  }
Integration test suite for autocomplete tags.
<p>
Verifies that the whitelist of key can be configured via "zipkin.storage.autocomplete-keys".
zipkin-server/src/test/java/zipkin2/server/internal/ITZipkinServerAutocomplete.java