Makes "segmentation_id" configurable

We should add the segmentation_id as tempest option,
so that it can be changed to match the deployment if needed.

Change-Id: I42bea9217462226e8650e55997449e1cc05f085c
Related-Prod: https://mirantis.jira.com/browse/PRODX-43703
(cherry picked from commit 8fdbc7bbe3231ce01ee2bfe44435744a25746c7f)
1 file changed