otava --help should not look up or validate current config

[Gerrrr]

% otava --help
Configuration key not found: GRAPHITE_ADDRESS: unbound variable

[Nortsx]

Let me take it :)

[Gerrrr]

Awesome, thanks for picking it up @Nortsx ! I have assigned the issue to you. Don't hesitate to reach out if you have any questions.

[smccarthy788]

I've solved this in #86.

[Gerrrr]

This is now solved in both 0.7.0 and master.