Support Disabling uchiwa auth

[nishiki]

Hi,
I use an oauth2 proxy in front of uchiwa to identify my users, i don't need a second authentication layer.
My problem is the uchiwa cookbook forces me to use uchiwa authentication. While i could do a recipe who unsets theses attributes that would be a hack.

Perhaps you could remove default['uchiwa']['settings']['user'] = 'admin' and default['uchiwa']['settings']['pass'] = 'supersecret' in attributes/default.rb ?

Regards

[majormoses]

could you not set it to nil? I think the cookbook checks if its nil

[majormoses]

I lied it does not support it: #57