7e134bd uml: Add more specific error message on failed FindBy call

Authored and Committed by John Ferlan 6 years ago
    uml: Add more specific error message on failed FindBy call
    
    Rather than an empty failed to find, let's provide a bit more
    knowledge about what we failed to find by using the name string
    or the id value.
    
    Signed-off-by: John Ferlan <jferlan@redhat.com>
    Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
    
        
file modified
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