use Cmds.stream! instead of Cmds.stream to raise error on failure
use Cmds.stream! instead of Cmds.stream to raise error on failure

i'm not sure *why* this wasn't being used, and i can't find any notes
in the commit logs. gonna try this change because it's obviously
fucking up playbooks to have them continue after a command erros.

nrser/qb,nrser/qb,nrser/qb,nrser/qb