From maven or testrunner.sh, how can enable/disable testcase

Thanks. This would be a nice feature to add but it sounds like a writing a new test runner would be required.
I guess the test runner would have check all steps of a test case to see if there is a manual step before choosing to execute the test case or not.

If I read your code correctly, the code disables all manual test steps but not disabling the test cases that have manual test steps.