[BUG] [consumer-connection] config is not working

[draneone]

Describe the bug
I'm trying to change token-header-name via file config and it doesn't apply.

To Reproduce
Steps to reproduce the behavior:

1. Add to config file:

[consumer-connection]
token-header-name=Authorization

2. Send a request to a channel
3. See that token header name is always "X-Broker-Consumer-Token"

Expected behavior
Consumer token header name should be "Authorization" instead of "X-Broker-Consumer-Token". Same with user-agent option.

Additional context

I did a dirty fix for myself in a worker.go file to make it work, but I don't think I did it proper way (it works and pass the tests). Here is my commit with fix:
draneone@ea4907d