Portugal's Galp Energia has resumed talks with potential partners as it seeks to develop a discovery in Namibia, the company said on Monday after reporting a 29% drop in adjusted first-quarter core profit.In February, Galp said it had found a significant presence of light oil and gas condensate in a fifth well in the Mopane field offshore Namibia.Co-CEO Maria Joao Carioca said the well "unlocked a new exciting area within Mopane" and Galp will advance on feasibility studies "in the coming months".At the same time…