make QChem error handler consistent with merging of class MXYZ and XYZ
make QChem error handler consistent with merging of class MXYZ and XYZ

materialsproject/custodian,materialsproject/custodian,xhqu1981/custodian,specter119/custodian,specter119/custodian,specter119/custodian,materialsproject/custodian