add configuration property to JBoss AS containers to explode deployment

In some cases, it's necessary to have JBoss AS explode the deployment on the server. For instance, if the framework (such as Weld Servlet) uses archive scanning, it wouldn't be able to handle the VFS files. While a more formal solution may be appropriate, a stopgap measure is often to have the archive exploded once it arrives at the server. The DeploymentManager offers this option, and thus we should have a configuration property for it.