Pass undercloud inventory for running preflight validations
Pass undercloud inventory for running preflight validations

The undercloud name is hardcoded in the preflight validations.
This patch generate an undercloud inventory in order to run
preflight validations as prep step of the undercloud install.

Closes-bug: #1994032

Change-Id: I66d6435e41a42a9db1772eea36e41c7a5cf87d23

openstack/python-tripleoclient