Torts — Premises liability — Product liability — Asbestos — Action by employee of power company against contractor for power company which provided services at power plant where plaintiff worked, alleging that defendant failed to warn plaintiff of the danger of asbestos dust created by others at the power plant which caused plaintiff’s mesothelioma — Trial court erred in denying defendant’s motion for directed verdict where there was insufficient evidence that defendant exercised the possession and control of premises required to satisfy a premises liability claim — Discovery — Trial court also erred in giving an adverse inference jury instruction, as a sanction for defendant’s failure to search for former employees who might have been able to provide information for corporate representative’s deposition, that jury could infer that such information would have been unfavorable to defendant