[CHORE] update ripple chart api, ripple REST api endpoints
[FEATURE] move mailer temporarily for sent XRP notification
[CHORE] get aws-ses stats logic
[CHORE] refactor outgoing payment middleware module
[CHORE] update ripple rest endpoint
[CHORE] update ripple-gateway version number
[CHORE] move gateway from a separate folder to a module, select
processes
[CHORE] increase ripple charts api call timeout