@Override
        public boolean isReadOnly() {
            return false;
        }
As {@link #reconfigureOpenfireHome()} allows properties to persist, this method clears all existing properties
(both XML and 'database') to ensure clean test output. Ideally should be called in a {@link org.junit.Before} method.

@param except properties that are not cleared if they are set.
xmppserver/src/test/java/org/jivesoftware/Fixtures.java