Counties — Whistleblowers — Trial court erred in entering summary judgment for county in action by terminated employee, alleging that plaintiff was dismissed in retaliation for his disclosure of improper behavior by county commissioner — Evidence was sufficient to allow jury to make determination of whether a causal relationship existed between former employee’s protected activity and his termination — Evidence was sufficient to present a jury question as to whether county’s reason for termination of former employee, budgetary problems, was pretextual