In oe-core, PTESTS_PROBLEMS are also enabled, so even though
the recipe might have failures or the ptests do not run cleanly,
the BBCLASSEXTEND still works.
Enable the same behavior for meta-python.
Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>