We want to dynamically trigger integration tests in different downstream builds in jenkins. We have a parametrized integration test project that takes a test name as a param
Since you are already starting the downstream jobs dynamically, how about you wait until they done and copy the test result files (I would archive them on the downstream jobs and then just download the 'build' artifacts) to the parent workspace. You might need to aggregate the files manually, depending if the Test plugin can work with several test result pages. In the post build step of the parent jobs configure the appropriate test plugin.