Remove ssl_certificates cookbook dependency

[brk3]

It's now up to the user to get their certificates onto the target system
however they see fit.

We just need three attributes; 'ssl_keyfile_path', 'ssl_certfile_path',
and optionally 'ssl_cabundle_path'.

Fixes Issue #10

[StephenKing]

Thanks for that!

As far as I remember, most cookbooks require the path to the certificates to be set below their own attribute hierarchy, like node[:gerrit][:ssl_certificates] instead of node[:ssl_certificates].

What do you think of that?

[brk3]

Sounds fine Stephen, I'll make an update.

[StephenKing]

Fine. Do you think node[:gerrit][:ssl_certificates] is already the best choice? It's not related to a proxy (Gerrit could do it on its own AFAIK), so I assume so right now, however not totally sure.

[brk3]

I don't feel strongly about it one way or another :) I think putting it under a gerrit namespace as you said makes sense as it keeps it separate from other attributes that may be on the node.

[hgontijo]

Thanks for adding -- ssl_cabundle_path = '' -- since the current version fails if ssl is to be installed and no ssl_cabundle_path is provided.