Add attributes to node.json which is used by openssh cookbook

openssh cookbook has attribute configuration.
I don't want to modify original attibute which has default value,
I put attribute value to node.json.
Add knife-solo_data_bag

knife-solo don't use "knife solo data bag" command.
"knife-solo_data_bag" plug-in enable knife-solo to use the command.
Add user creation recipe with encrypted data bags

I add custom-user recipe which create new user and set password.
password is encrypted by encrypted-data-bags.

But authorized_keys file is not createad normally.

Next I'll check it.