Console fails to display datasources correctly when a datasource has a property substitution in JBoss EAP

Issue

• One or more datasources are defined using property substitution for the enabled attribute in the datasources subsystem in standalone*.xml or domain.xml:

              <datasource jndi-name="java:jboss/datasources/ExampleDS" pool-name="ExampleDS" enabled="${h2.enabled}" ...>
                  ...
              </datasource>
              ...
  

• The server is started using an external properties file (e.g. bin/standalone.sh -P config.properties) with a name/value pair (e.g. h2.enabled=true.
• In the web console, navigate to the "Configuration" tab then through "Subsystems" -> "Datasources & Drivers" and click on "Datasources".
• The web console fails to display the datasource (and may display a limited number of the others defined in the same profile - whether or not they have any substitution) and briefly raises one or more "Internal Error" "pop-up(s)".