[GSS](8.0.z) JSF: Do not override application-specified "com.sun.faces.enableDistributable" value

https://github.com/eclipse-ee4j/mojarra/issues/5345

Mojarra defines a number of initialization parameters. While "com.sun.faces.enableDistributable" is one of them, Mojarra automatically overrides any existing setting provided by the application.
If a web application wanted explicitly disable this for a distributable web application, it would normally add a servlet context parameter within web.xml.
e.g.

<web-app>
<distributable/>
<context-param>
<param-name>com.sun.faces.enableDistributable</param-name>
<param-value>false</param-value>
</context-param>
</web-app> 

However, the ConfigureListener auto-enables the com.sun.faces.enableDistributable configuration property whenever it see that the tag in web.xml, overriding any custom setting.
I would expect Mojarra to respect the setting defined by the application, and only provide a default value if no value was specified.