@AfterAll
    public static void tearDownClass() {
        Fixtures.clearExistingProperties();
    }
Prepares the local server for operation. This mostly involves preparing the test fixture by mocking parts of the
API that {@link LocalOutgoingServerSession#createOutgoingSession(DomainPair, int)} uses when establishing a
connection.
xmppserver/src/test/java/org/jivesoftware/openfire/session/LocalIncomingServerSessionTest.java