Ticket 49526 - Improve create_test.py script
Description: Autofill "setup" docstring, and fix python warning about
passing a string to "main"
https://pagure.io/389-ds-base/issue/49526
Reviewed by: spichugi (Thanks!)
(cherry picked from commit 66ee27de4849d2749251e4cfc5df4d1791c2947e)