adds test_reset_observations_node_error
adds test_reset_observations_node_error

jhonatanoliveira/pgmpy,anaviltripathi/pgmpy,abinashpanda/pgmpy,yashu-seth/pgmpy,vivek425ster/pgmpy,kris-singh/pgmpy,khalibartan/pgmpy,ankurankan/pgmpy,pgmpy/pgmpy,yashu-seth/pgmpy,palashahuja/pgmpy,khalibartan/pgmpy,kislayabhi/pgmpy,abinashpanda/pgmpy,anaviltripathi/pgmpy,sandeepkrjha/pgmpy,liquidmetal/pgmpy,pratyakshs/pgmpy,kislayabhi/pgmpy,jhonatanoliveira/pgmpy,pgmpy/pgmpy,palashahuja/pgmpy,ankurankan/pgmpy,liquidmetal/pgmpy,vivek425ster/pgmpy,pratyakshs/pgmpy,sandeepkrjha/pgmpy,kris-singh/pgmpy