@AfterEach
    public void tearDown() {
        Fixtures.clearExistingProperties();
    }
Verifies the functionality of the event listening mechanism as provided by {@link EntityCapabilitiesListener}

@author Guus der Kinderen, guus.der.kinderen@gmail.com
xmppserver/src/test/java/org/jivesoftware/openfire/entitycaps/EntityCapabilitiesListenerTest.java