Add a single login for all tests in the form of a global setup. This commit also removes the login from all tests and replaces it with navigation to landing page and revamps the popup closing logic from being applied in logging step into a separate fixture.
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.
