@JsonIgnore
    public HashAlgorithm getDefaultApiKeyHashAlgorithm() {
        return uiConfig.getDefaultApiKeyHashAlgorithm();
    }
Allows us to make other back-end config available to the UI while having one mechanism
to cache the config in the ui.
stroom-core-shared/src/main/java/stroom/ui/config/shared/ExtendedUiConfig.java