9db1d9ba13429d80e30c97ca3fecc6489f0ed7dc

* do not lose auto-selected device while running several tests * reduce output noise * list available devices if unable to auto-select device * fix error message when no devices connected
OpenCV: open source computer vision library Homepage: http://opencv.org Online docs: http://docs.opencv.org Q&A forum: http://answers.opencv.org Dev zone: http://code.opencv.org
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