OSLO (Reuters) - Sweden's Lundin Energy will cut its spending plans after a smaller-than-expected rise in first-quarter profit, the partner in Norway's Johan Sverdrup oilfield said on Thursday.Its earnings before interest and tax (EBIT) rose to $404 million from $261 million a year earlier but lagged the $442 million expected by analysts, Refinitiv Eikon data showed.Sales volumes rose as Sverdrup achieved production of 470,000 barrels per day in April, a month sooner than forecast by operator..