LPS-42186 Update integration test
Revert "LPS-42194"

This reverts commit 2dfd7c995737d2076ab3eecb52d498ecee0bbb97.
Revert "LPS-42194 PortletClassLoaderUtil causes plugin classloader leaking"

This reverts commit 2af65384ee4af51a649b82a2321e4facdc7141b0.