Cook County and Fox Television are being sued after the Cook County Juvenile Temporary Detention Center was allegedly placed on lockdown for about two weeks last year when two episodes of the Fox television show “Empire” were filmed there.Two juveniles and their guardians, who are only identified by their initials in the complaint, are suing the county, Twentieth Century Fox Television Inc. and other affiliated Fox companies based on the claim they were responsible for the facility being placed on lockdown …