10.15 First Amendment, dated December 12, 2016, to the Term Loan Agreement, dated as of August 1, 2016, among Registrant, JPMorgan Chase Bank, N.A., as Administrative Agent, Bank of America, N.A., as Syndication Agent, and Barclays Bank PLC, Citibank, N.A., Wells Fargo Bank, National Association, Royal Bank of Canada, Mizuho Bank, Ltd., and TD Securities (USA) LLC, as Co-Documentation Agents, JPMorgan Chase Bank, N.A., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Barclays Bank, PLC, Citigroup Global Markets Inc., Wells Fargo Securities, LLC, Royal Bank of Canada and Mizuho Bank, Ltd., as Joint Lead Arrangers and Joint Bookrunners.