On Windows and macOS, the containers are deployed into a virtual
machine using the host network. All the containers share the same
hostname (qt-test-server), and they are connected to the same network
domain (local).
When running test in such platforms, use the single-name SSL certificate
(qt-test-server.local) for SSL related tests.
Change-Id: Idf33e01e8dd8814510d848b87b59b5fc0edc903e
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>