@Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final ExtendedUiConfig that = (ExtendedUiConfig) o;
        return externalIdentityProvider == that.externalIdentityProvider && Objects.equals(uiConfig,
                that.uiConfig);
    }
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