deploy: use --no-wait -N 1 for testers
deploy: use --no-wait -N 1 for testers

This avoids long running processes, and makes it easier to deploy updated
testers.

Signed-off-by: Paolo Bonzini <69d3ebcf5ee4e7f05a50dc23cd96655b730804b4@redhat.com>

patchew-project/patchew,patchew-project/patchew,patchew-project/patchew,patchew-project/patchew