Adding a system property via the CLI whose value is an unresolved system property fails unless it ends in : in JBoss EAP 7

Issue

Adding a system property whose value is another system property does not work.

[standalone@embedded /] /system-property=test:add(value="${TEST}")
{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0211: Cannot resolve expression '${TEST}'",
    "rolled-back" => true
}