Right now it is possible to set as the default web module for a virtual-server
the admingui web-app. The admin gui fail to start once set as default web module
other than the admin virtual server. If the admin-gui cannot be used outside the
admin vs, then admingui shouldn't be a choice when changing the virtual-server
default web app. If the admin gui can be used not only on admin vs, then web-app
shoudn't rely on any other web-app in order to work on other vs.