On-prem the distro and architecture are set after the wizard has been
opened. This triggers a reload of the image types and makes the tests
very flaky.
If no blueprint was created, the cleanup function fails gracefully without throwing error. Also includes a fix for a missing navigation to the IB landing page.
Adds a Hostname customization test that creates a BP, edits BP, exports and imports it back and verifies the BP content.
This test also servers as a template for other customization tests. Includes a refactor of existing helper functions.
