RFR: JDK-8200132: Remove jre images and bundles

[Erik Joelsson]

Since JDK 9 and modules, the idea of a prebuilt JRE is no longer 
providing much value. The idea is rather that you link together an image 
with the modules and settings you actually need, either with or without 
your application. For this reason oracle will no longer ship JRE images 
that differ content wise to the JDK image in JDK 11 and we would like to 
remove them from the OpenJDK build to reduce complexity.

Bug: https://bugs.openjdk.java.net/browse/JDK-8200132

Webrev: http://cr.openjdk.java.net/~erikj/8200132/webrev.01/

/Erik