zdtm: add script to execute test cases
zdtm: add script to execute test cases

If you execute this script without arguments, it will execute
all test cases, which should pass.

Or the first argument may be a path to the test case.

Signed-off-by: Andrey Vagin <74c05afa918858348d6db8037d82fa8124870113@openvz.org>
Signed-off-by: Cyrill Gorcunov <7a1ea01eee6961eb1e372e3508c2670446d086f4@openvz.org>

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