Chefspec 3.1

I am trying to write some more tests for munin. But munin only makes sense with a lot of searching and real results. So it would be fun to use chef-solo with chefspec for munin. Which in turn requires upcoming chefspec3.1.

So lets make this cookbook depend on chefspec3.1.0.beta.1.

Oh, and set the auth-method to htpasswd so the cookbook converges without throwing an error because of missing openid-stuff.