Reuters: Halliburton Co (HAL.N) is suing BP Plc (BP.L) (BP.N) for "negligent misrepresentation, business disparagement and defamation" related to BP's claims about who was to blame for last year's Macondo oil spill in the Gulf of Mexico. Halliburton said BP provided inaccurate information prior to Halliburton carrying out its cementing services the day before the disaster, according to the lawsuit, which was filed in Texas state court. Halliburton said BP knew or should have known about an additional...