3ed1180 Document integration test case and test environment design

Authored and Committed by csomh 4 years ago
    Document integration test case and test environment design
    
    Update the integration test README to explain the design of the test
    case and test environment code. This should help future contributors.
    
    Signed-off-by: Hunor Csomortáni <csomh@redhat.com>
    
        
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