bddbfd5 Convert test case for utils.py as normal test case

Authored and Committed by cqi 5 years ago
    Convert test case for utils.py as normal test case
    
    Existing test case in test_utils.py does not require git repos, so it is
    not necessary to inherit from CliTestCase. This change could save time
    to create and destroy git repos for each test.
    
    Signed-off-by: Chenxiong Qi <cqi@redhat.com>
    
        
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