Add new exceptions for Role appliers
Add new exceptions for Role appliers

Prepare for categorizing errors produced by `RoleToRoleApplier` and
`RoleToClassApplier`

salortiz/rakudo,labster/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,rakudo/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,salortiz/rakudo,salortiz/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,labster/rakudo,labster/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,salortiz/rakudo,salortiz/rakudo,MasterDuke17/rakudo,rakudo/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo