@JsonIgnore
    public void setDatabaseOverrideValue(final String databaseOverrideValue) {
        // If somebody overrides the default with a value identical to the default then we need to save it
        this.databaseOverrideValue = OverrideValue.with(databaseOverrideValue);
    }
@return The cluster wide value set in the UI and stored in the database, if present.
If no database override value has been set an exception will be thrown.
Test with hasDatabaseOverride() first.
stroom-core-shared/src/main/java/stroom/config/global/shared/ConfigProperty.java