Master should be configurable

[HarVar-B]

As a user

I want to configure master

So that I may customise and maintain

Acceptance Criteria

• [ ] Criteria 1
  • Given GFY configured system
  • When configuration is not given through cli
  • Then it should pick configuration from environment variables
• [ ] Criteria 2
  • Given GFY configured system
  • When configuration is not given through cli and environment variables
  • Then it should pick configuration from config files at default path etc/GFY/master.config