“ Applicant Julia Shields is a duly qualified Atlanta voter. Both applicants claim that their constitutional and statutory rights are abridged by the exclusion of potential candidates for local offices who cannot afford the filing fees fixed by an Atlanta municipal ordinance of August 26, 1969. They challenge the ordinance on the ground that fees sought to be exacted violate the Equal Protection Clause of the Fourteenth Amendment and § 5 of the Voting Rights Act of 1965, 79 Stat. ”