Add Logging via Zap Logger

[uzaxirr]

Is your feature request related to a problem? Please describe.
Currently we use the traditional golang log package for logging purpose, however its not sufficient as it lacks a lot of basic functionality like an error level log.

Describe the solution you'd like
Use Zap Logger and replace all the occurrence of log package with this one. Also add new logger statements whenever necessary.

Describe alternatives you've considered
logrus

[chauhan17nitin]

Hi, @uzaxirr let me know if i can pick this,

planning to integrate a singleton Zap Logger, with TransactionID support in context,

which will ultimately help to track all logs related to a single request using a single filter on all logs.

[abskrj]

sure, @chauhan17nitin
assigning it to you