Fix routing_info_spec: remove nonexistent name field from RouteAccessRule

RouteAccessRule does not have a name column. The test was passing
name: to create(), triggering Sequel::MassAssignmentRestriction.

Author: rkoster

spec/unit/lib/cloud_controller/diego/protocol/routing_info_spec.rb

@@ -265,15 +265,13 @@ class Protocol
               let!(:access_rule1) do
                 RouteAccessRule.create(
                   guid: SecureRandom.uuid,
-                  name: 'allow-app',
                   selector: "cf:app:#{valid_uuid}",
                   route_id: mtls_route.id
                 )
               end
               let!(:access_rule2) do
                 RouteAccessRule.create(
                   guid: SecureRandom.uuid,
-                  name: 'allow-space',
                   selector: "cf:space:#{valid_uuid}",
                   route_id: mtls_route.id
                 )