713c9b0 Don't fail if config-show does not return servers

Authored and Committed by cheimes 5 years ago
    Don't fail if config-show does not return servers
    
    When uninstalling a cluster and only hidden servers are left,
    config-show can return a result set without ipa_master_server entry.
    
    Fixes: https://pagure.io/freeipa/issue/7892
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Francois Cami <fcami@redhat.com>
    Reviewed-By: Thomas Woerner <twoerner@redhat.com>
    
        
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