adds test_model method to test_XMLBIF, tests now failing
adds test_model method to test_XMLBIF, tests now failing

khalibartan/pgmpy,kris-singh/pgmpy,jhonatanoliveira/pgmpy,sandeepkrjha/pgmpy,pgmpy/pgmpy,abinashpanda/pgmpy,jhonatanoliveira/pgmpy,kris-singh/pgmpy,sandeepkrjha/pgmpy,khalibartan/pgmpy,ankurankan/pgmpy,pgmpy/pgmpy,abinashpanda/pgmpy,ankurankan/pgmpy