adds code to remove files generated during test
adds code to remove files generated during test

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