JOINDER AGREEMENT DATED AS OF APRIL 10, 2015 TO THE AMENDED AND RESTATED CREDIT AGREEMENT DATED MARCH 31, 2014 among as the Borrower, GOLDMAN SACHS (ASIA) L.L.C., GOLDMAN SACHS BANK USA, BARCLAYS BANK PLC, BANCO NACIONAL ULTRAMARINO, S.A., THE BANK OF...