Ticket 50877 - task to run tests of csn generator
    
    Bug Description:
    	It exists a test of csn generator (csngen_test()).
            It is not called from any function.
    
    Fix Description:
    	register a task container 'cn=csngen_test,cn=tasks,cn=config"
    	that calls the test function
    
    https://pagure.io/389-ds-base/issue/50877
    
    Reviewed by: William Brown (Thanks !)
    
    Platforms tested: F30
    
    Flag Day: no
    
    Doc impact: no