Description of problem:
Installation of DV 6.3.0. ER3 doesn't finish when the DV is being installed over an existing EAP instance of version 6.4.7.
The issue is not observable with EAP 6.4.6.

The installation fails in processing phase during configuration of domain mode when the server is being started with host-slave.xml configuration file.

INFO: Finished commands from: com.redhat.installer.asconfiguration.processpanel.postinstallation.DefaultVault
Advanced configuration command failed: undefined
{
    "outcome" => "failed",
    "failure-description" => "JBAS014883: No resource definition is registered for address [
    (\"host\" => \"master\"),
    (\"core-service\" => \"vault\")
]",
    "rolled-back" => true,
    "command" => undefined
}
Running on-fail server check.
Shutting server down.

After that installer ends with error message screen.

But the domain servers triggered during installation stay active. This results in two host processes running on the machine, even though the installer closes properly.