Add admin and orgs

Add recipes for creating admin users and creating organizations.

Borrowed functionality from @misheska at https://github.com/misheska-cookbooks/chef-server12

Would like to combine the functionality provided by these two cookbooks into one chef-server cookbook to rule them all. 
We should set this to an @ example.com email, so it has to be changed for real email to go anywhere, but doesn't inadvertently start sending email to an address at our domain.