[jboss-as7-dev] System property replacement in deployment descriptors

In previous versions of JBoss AS, we used to allow system property replacement in deployment descriptors (just like we now do in standalone/domain.xml). It seems to have been pretty popular and I have already seen more than a couple of users asking for this in AS7. Should we add support for this (hopefully in a central/common place for all deployment descriptors including non EE ones like jboss-deployment-structure.xml)? -Jaikiran