:enable_retry config option causes all requests to fail

[brucek]

With enable_retry: false, things are good

Once I enable it, I always get this error:

/usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:54:in `request': Max retry attempts reached (StandardError)
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:51:in `block in request'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:50:in `yield'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:50:in `block (2 levels) in intervals'
	from <internal:kernel>:187:in `loop'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:49:in `block in intervals'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `each'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `each'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `request'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:51:in `block in request'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:50:in `yield'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:50:in `block (2 levels) in intervals'
	from <internal:kernel>:187:in `loop'
	from /usr/local/bundle/gems/exponential-backoff-0.0.4/lib/exponential_backoff.rb:49:in `block in intervals'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `each'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `each'
	from /usr/local/bundle/gems/novu-1.3.0/lib/novu/api/connection.rb:49:in `request'
	... 30 levels...