Ticket #48662 - db2index with no attribute args fail.
    
    Description: commit 5a33dc002205d2167c786dd2c05f23218f28341d for #48662
    failed to support the case:
      db2index -Z SERVERID -n BACKEND
    
    When the command line satisfies the condition, it executes indexing all.
    
    https://fedorahosted.org/389/ticket/48662
    
    Reviewed by wibrown@redhat.com (Thank you, William!!)