The name of yaml exceptions is more consistent between Py2->3
The name of yaml exceptions is more consistent between Py2->3

rocky4570/moto,rocky4570/moto,Affirm/moto,ZuluPro/moto,Brett55/moto,whummer/moto,whummer/moto,Affirm/moto,dbfr3qs/moto,Brett55/moto,whummer/moto,spulec/moto,spulec/moto,okomestudio/moto,ZuluPro/moto,rocky4570/moto,Affirm/moto,ZuluPro/moto,william-richard/moto,dbfr3qs/moto,spulec/moto,whummer/moto,ZuluPro/moto,botify-labs/moto,okomestudio/moto,spulec/moto,dbfr3qs/moto,Affirm/moto,spulec/moto,rocky4570/moto,kefo/moto,ZuluPro/moto,Brett55/moto,rocky4570/moto,william-richard/moto,ZuluPro/moto,botify-labs/moto,botify-labs/moto,rocky4570/moto,kefo/moto,okomestudio/moto,okomestudio/moto,kefo/moto,kefo/moto,Brett55/moto,Affirm/moto,okomestudio/moto,william-richard/moto,kefo/moto,Affirm/moto,okomestudio/moto,botify-labs/moto,dbfr3qs/moto,william-richard/moto,william-richard/moto,dbfr3qs/moto,whummer/moto,william-richard/moto,Brett55/moto,spulec/moto,dbfr3qs/moto,Brett55/moto,whummer/moto,botify-labs/moto,botify-labs/moto