z2-Environment

As Spring moved from DisposableBean to Closeable.

I.e. we must add

if (this.ctxt instanceof Closeable) {
    logger.fine("Closing spring context component: "+this.name);
    try {
        ((Closeable) this.ctxt).close();
    } catch (Exception e) {
        logger.log(Level.WARNING,"Exception during context close: "+this.name,e);
    }
}

to ContextResource invalidate. }