Multiple versions of Java installed

SRI primitives such as primitives/SRI/d3m.primitives.learner.model.GeneralRelational/1.9.6/primitive.json require openjdk-8-jdk-headless

RPI primitives such as primitives/RPI/d3m.primitives.regression.global_causal_discovery.RegressorRPI/v2020.5.18/primitive.json require openjdk-8-jdk-headless. Additionally they change the default for everybody from their setup.py

Distil primitives such as primitives/Distil/d3m.primitives.data_cleaning.geocoding.Goat_reverse/1.0.8/primitive.json require default-jre-headless, which installs openjdk-11-jre-headless

The result is that two versions of openjdk get installed:

• 179.1 MiB java-11-openjdk-amd64
• 155.7 MiB java-8-openjdk-amd64

Possible fixes:

• OpenJDK 8 users could update (since RPI go out of their way to set the default JRE I suppose there is a good reason)
• default-jre-headless users could depend on java-runtime-headless instead which wouldn't force the installation of version 11 if there is already a runtime installed. Java 8 is already the one they end up using.