Nevada-based Eldorado Resorts Inc. expects to close Monday on its $1.7 billion purchase of Isle of Capri Inc., operator of two casinos in Black Hawk. The companies have received all consents and approvals from state gaming commissions needed to complete the merger, company officials said in a regulatory filing Thursday. St. Louis-based Isle of Capri (Nasdaq: ISLE) operates the Isle Casino Hotel and the Lady Luck Casino, both in Black Hawk. The company's sale to Reno-based Eldorado (Nasdaq: ERI)…