rapi: Don't throw class as an exception
rapi: Don't throw class as an exception

Reviewed-by: ultrotter


bitemyapp/ganeti,andir/ganeti,mbakke/ganeti,apyrgio/ganeti,andir/ganeti,grnet/snf-ganeti,apyrgio/snf-ganeti,apyrgio/ganeti,leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,dimara/ganeti,onponomarev/ganeti,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,andir/ganeti,ganeti/ganeti,mbakke/ganeti,ganeti/ganeti,dimara/ganeti,grnet/snf-ganeti,yiannist/ganeti,leshchevds/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1