A former official with BP's drilling operations in the Gulf of Mexico resigned just months before last year's oil spill because of disagreements with the oil giant over its commitment to safety, according to a class-action federal lawsuit...Documents filed [in the case]...claim Kevin Lacy, BP's former senior vice president for drilling operations for the Gulf of Mexico,...resign[ed] in December 2009 because he believed the company was not adequately committed to improving safety protocols in offshore drilling operations...The claims come in...[a] lawsuit...that alleges BP inflated its stock price by hiding information and making false and misleading statements about its safety practices before the Gulf of Mexico oil spill...BP spokesman Daren Beaudo declined to comment on the lawsuit...The amended complaint claims that a company reorganization that began in 2007...resulted in numerous layoffs and cuts to safety budgets... [also refers to Transocean, Halliburton]