Get rid of the AppKernelTest classes => only one kernel initialized for the context (downside: we have to register the PIM's IntegrationTestBundles in the "real" AppKernel before running the tests)
enhance integration tests setUp (e.g: don't load the fixtures if it's not needed)
Rework integration tests organization:
AppKernelTestclasses => only one kernel initialized for the context (downside: we have to register the PIM's IntegrationTestBundles in the "real" AppKernel before running the tests)