Fix absent role deletion, Add more delete_user tests, add no conflict deletion testing
Fix absent role deletion, Add more delete_user tests, add no conflict deletion testing

spulec/moto,william-richard/moto,william-richard/moto,william-richard/moto,william-richard/moto,spulec/moto,william-richard/moto,spulec/moto,spulec/moto,william-richard/moto,spulec/moto,spulec/moto