Ensure to use keyword parameters in format string in create_instance.py

Fixes bug #1177629

Change-Id: If5a8b74bbcb698f2833ada275be914271dc1b995
(cherry picked from commit 58b0e62cab3b81898719881d4f8d16e094eb4854)
Merge "Ensure to use keyword parameters in format string in create_instance.py" into stable/grizzly