Renamed resource variables to more readable names

Change-Id: I733d75f00bb04745c67cbfbdb549fb8bb7115647
Rename a_url to auth_url

Change-Id: I348feda0c5e981d8a37f363225bec6ea715a6ef9
Created retry decorator

Change-Id: I9c625e6e68ee606ff50617fd300a5f66db101a7e
Re-factored filterAz function

Change-Id: I9a973544835c007951256c324707e69d6eb435aa