UniqueServingConfigRestriction

Do not allow the same ServingConfig.name to be shown on multiple panels. Example: Panel1 candidates: * pdp_ctr, pdp_cvr, home_page_ctr_no_diversity * Panel2 candidates: * home_page_ctr_no_diversity, home_page_ctr_diversity_low, pdp_cvr_no_diversity * Restriction = UNIQUE_SERVING_CONFIG_RESTRICTION Valid combinations: * * (pdp_ctr, home_page_ctr_no_diversity) * (pdp_ctr, home_page_ctr_diversity_low) * (pdp_ctr, pdp_cvr_no_diversity) * (pdp_ctr, pdp_cvr_no_diversity) * (pdp_cvr, home_page_ctr_no_diversity) * (pdp_cvr, home_page_ctr_diversity_low) * (pdp_cvr, pdp_cvr_no_diversity) * (home_page_ctr_no_diversity, home_page_ctr_diversity_low) * (home_page_ctr_no_diversity, pdp_cvr_no_diversity) * Invalid combinations: * * (home_page_ctr_no_diversity, home_page_ctr_no_diversity) *