oeqa/core/loader: Generate function _make_failed_test dynamically
Python versions has different features from branches 3.4.x, 3.5.x and
3.6.x, i expected in wrong mode that was incremental for example changes
in 3.4.4 be in 3.5.x but that's not true.
The _make_failed_test internal method differs and is only available in
certain versions >= 3.4.4 and in 3.5.x and 3.6.x branches but not
realeses have been made including it.
So to avoid futher problems inspect the _make_failed_test and generates
function definition according what parameters are needed, the unique
supossition is that exception argument is always passed.
Related to,
http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=
d8380d098a290510b442a7abd2dd5a50cabf5844
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>