The owner of dozens of rental units failed to make the case that a far north suburb is trying to shrink the amount of available housing for racial minorities in violation of the Fair Housing Act, a federal judge ruled Monday.In a written opinion, U.S. District Judge Edmond E. Chang threw out a lawsuit TBS Group LLC filed against the city of Zion.TBS alleges the city in July 2015 adopted an ordinance requiring the inspection of rental units — and the payment of inspection fees — in order to drive property owners …