How can I integrate jmeter performance tests with the default test suite provided by plone's bin/test?
I want to be able to run jmeter tests against a clean instance of plone, one whose initial state will be always the same. In this way, jmeter can create and delete content, and I don't have to worry claning up afterwards, just like plone's test suite works.
Quite late, but I hope an answer is always welcome 
So what you actually want is not to make bin/test (not) fail due to jmeter but instead look for a way to run jmeter tests on a clean instance right?
Then you most probably want to look at doing that with Jenkins. You can create a script that generates a site, starts it, then run jmeter tests on it and finally tears it down.