issue #426: disable Ansible smart transport.

tests/ansible/ansible.cfg

@@ -12,6 +12,9 @@ retry_files_enabled = False
 display_args_to_stdout = True
 forks = 100
 
+# On MacOS, "smart" with a password set causes Ansible to use paramiko.
+transport = ssh
+
 no_target_syslog = True
 
 # Required by integration/ssh/timeouts.yml