I want to do some functional testing on a (restful) webservice. The testsuite contains a bunch of test cases, each of which performs a couple of HTTP requests on the webserv
As an aside, it's a bad idea to have unit tests actually calling external resources like webservices, databases, etc.
Unit tests should be super-quick to run and a delay of 'a couple of minutes' for each run of the suite will mean it won't be run as much as it should.
My advice:
Look at mocking external dependencies in unit tests with something like EasyMock (http://www.easymock.org/).
Build a seperate suite of integration tests with something like Fitnesse (http://fitnesse.org/) or a homegrown solution that runs against a test environment and which is continually up.