def parse_wal_files_list(lines)
      wal_files = Array.new
      lines.each do |line|
        wal_files << WalFile.parse(line.split("/").last)
      end
      return wal_files
    end
def parse_wal_files_list(lines)
      wal_files = Array.new
      lines.each do |line|
        wal_files << WalFile.parse(line.split("/").last)
      end
      return wal_files
    end
Creates a {WalFiles} object by parsing lines reported by barman
 @param [Array<String>] lines an array of lines like '/var/lib/barman/test/wals/00000001000005A9/00000001000005A9000000BC'
 @return [WalFiles] the {WalFiles}