Configure JGroups stack using system property in JBoss EAP 7

Issue

Unable to use an expression in the protocol stack of the JGroups channel for system property substitution for the 'stack' attribute in <channel..> tag of JGroups as below. We are trying to specify the stack value when starting EAP.

<subsystem xmlns="urn:jboss:domain:jgroups:5.0">
<channels default="ee">

<channel name="ee" stack="${my_jgroups_stack}" cluster="ejb"/>
</channels>
<stacks>
....
</subsystem>