Our code (test_connection and more) relies on calling list_tenants on the Openstack Fog object - https://github.com/fog/fog/blob/master/lib/fog/openstack/requests/compute/list_tenants.rb
This object needs an instance variable @identity_connection to make requests to Openstack Keystone. On fog versions prior to 1.36, this variable was automatically set during authentication.

However, this commit https://github.com/fog/fog/commit/4d5287020d961e794ac279c640c69a66238c33f7#diff-3aa267766daa7f21447cd3c77b43bf39R412 moves the instance variable setup to a `self.` (class) method.
Therefore the variable is simply never accessible so all parts on Fog 1.36 that call this instance variable from outside a Class (self. in ruby) context are broken.