test: use env variable to pass value containing user controlled value
When tests are run from a cwd that contains special characters in its path, those would be misinterpreted by the shell and make the test fail.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
When tests are run from a cwd that contains special characters in its path, those would be misinterpreted by the shell and make the test fail.