Clean up the warning:
meta/lib/oeqa/core/loader.py:27: DeprecationWarning: inspect.getargspec() is deprecated, use inspect.signature() or inspect.getfullargspec()
_failed_test_args = inspect.getargspec(unittest.loader._make_failed_test).args
(From OE-Core rev: d2deb66830be2d44532fea3d5db763b57778252a)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>