responder tests should make fewer Default attacks

* Partially addresses #1168
* Jenkins: http://jenkins.buttonweavers.com:8080/job/buttonmen-cgolubi1/373/

(That jenkins run took a long time, because it got hung up in phpmd for awhile.  I think that's probably just because i had previously done a build from a rather old branch.  If you just look at the phpunit section of jenkins, it claims to have finished about a minute faster.)