Fix Codacy issue in Timeline.java. Related #1070
Fix Codacy issue in Timeline.java. Related #1070

Link to codacy: https://www.codacy.com/app/sudheesh1995/loklak_server/file/6470204147/issues/source?bid=3495500&fileBranchId=3495500
Description: Fields should be declared at the top of the class

loklak/loklak_server,shivenmian/loklak_server,loklak/loklak_server,shivenmian/loklak_server,singhpratyush/loklak_server,shivenmian/loklak_server,shivenmian/loklak_server,shivenmian/loklak_server,loklak/loklak_server,loklak/loklak_server,singhpratyush/loklak_server,singhpratyush/loklak_server,singhpratyush/loklak_server,singhpratyush/loklak_server,shivenmian/loklak_server,singhpratyush/loklak_server,shivenmian/loklak_server,loklak/loklak_server,singhpratyush/loklak_server,loklak/loklak_server,loklak/loklak_server