Improve errors handling

[lxkuz]

1. We can use Faraday middlewares, logger for instance

Momoapi.configuredo |config|
#...config.faraday_block=Proc.newdo |f|
f.useFaraday::Response::Loggerendendend

2. Error will store transaction reference to be able to re-check transaction status even after errored/timeouted Momo API response

[raybesiga]

Apologies @lxkuz only just seeing this.